Since it's a daunting task to test all of the coffee preferences due to the fact each player can only work once per day, we're asking the community for help. This will also be a good chance to deduce the preferences of the newly added villagers. If you need information on unlocking the Roost and/or the ability to help out Brewster, see the end of this post. To contribute, simply do the following.

1. Open up this spreadsheet.
2. Help out Brewster. Use the spreadsheet to determine what to choose for each character that comes in. If there's already a confirmation (or it's a new villager that's not on the list), try out an untested combination to see if it works. Generally, villagers have a correlation between the Milk and Sugar (None/None, A Little/One Spoonful, Regular/Two Spoonfuls, Lots/Three Spoonfuls), so that's a good place to start when choosing those two options. Special characters don't necessarily follow this pattern though.
3. Post the results for each character here and I'll update the spreadsheet. Please use the following submission format:

Character Name: Beans, Milk, Sugar - how well it worked

For example, if I was reporting my confirmation of Apple's preferences I'd use:

Apple: Blend, Regular, Two Spoonfuls - Perfect

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We're also using this opportunity to try to figure out when the special characters can be found at the Roost. If you see one when you visit the Roost, please post here using the following format:

Character Name - Day of the Week and Time - whether you have the Early Bird or Night Owl ordinances in effect (or neither)

For example, I could report my DJ KK sightings as:

DJ KK - Saturday 5:45 to 6:30 pm - Night Owl ordinance

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Unlocking the Roost:
Once you've donated enough items items to the Museum and the Museum Shop has been open long enough, Blathers will bring up the Roost as a possible PWP.

Unlocking the ability to work at the Roost:
Once you've bought coffee enough days in a row, Brewster will give you this option.

This might help a little bit towards their schedule times, I'd assume they're all without Early Bird or Night Owl. It's also got the character's coffee preferences, but you've probably got all of those down already.

Jaymie 100,
    
      Thank you for the link. It will come in handy now that the new AC Welcome Amibo has a task to work at the roost for Moew coupons.

You'll get the Meow coupons anyway for working in the Roost, even when you really mess up the orders

I had to work at the Roost to earn coupons and made notes:

Rizzo: Mocha, None, None - Perfect
Broccolo: Blend, Regular, Two spoonfuls - Perfect
Teddy: Blend, Regular, Two spoonfuls - Perfect
Digby: Blue mountain, None, None - Perfect

Inkwell: ?, lots, 3

I got this from talking to him at the Roost. Will edit this post if I can ink out any more info.

Moving.

Lily: Mocha, a little bit, one spoonful - Perfect
Flurry: Mocha, none, none - Perfect
Benedict: Kilimanjaro, a little bit, one spoonful - Perfect
Tom Nook: Kilimanjaro, lots, one spoonful - Perfect

It was 12:43 pm and Resetti was hanging out at the coffee bar. I don't know when he came in, I don't know when he left. I'm not sure whether an ordinance has any effect on visiting times of special characters, but in case it has, I have the Beautiful town ordinance in effect.

It seems that the info I have on my town's coffee preferences are already recorded, but I'll keep an eye out for anything new I can contribute.

A few queries though:
1. What do the different highlights in the spreadsheet mean? (green, yellow, orange)
2. Would it be possible for Ctrl+f to work when viewing the spreadsheet?

I can only guess at those colors as well, Tay. Best guess is that green means it's been verified, yellow ... ehh and red = wrong. I also think that everything else, with a white background, still needs to be verified.

While looking at this, I scrolled all the way to the bottom and noticed there are only two types of coffee beans mentioned. Now, I've worked a lot at the Roost in both my towns, and I only stopped doing that after I collected everything; and that includes the different types of coffee beans. To my best knowledge, there are three types: Superb, Good and Normal, and they sell for 2000, 1000 and 500 Bells respectively. I have tried hard to perform in varied ways as barrista, and those three types were all I got. You have to do really badly to get the Normal beans.

I just retried being the worst barrista because it was such a long time ago, and I served Phineas coffee that was totally off. However, he complimented me and said that normally, he would only drink Kilimanjaro with lots of milk and three spoonfuls of sugar, but that he enjoyed what I had given him as well. He's a real Scout.

Annette is correct. Green means Perfect (all 3 correct), Yellow means Good (2 ingredients correct), Orange means Bad (1 ingredient correct), and eventually there will be Red for Terrible (no ingredients correct). Anything with a white background is as of yet unverified.

"While looking at this, I scrolled all the way to the bottom and noticed there are only two types of coffee beans mentioned."

That's because those are the only two that I've gotten thus far while experimenting and were therefore able to verify. I'll go ahead and add in your information and it will be tentaively complete.

Ah, I see. There is a lot of verification needed.

I believe these were listed, but I think in white:
Apple: Blend, regular, 2
Bam: Blend, a little bit, 1
Biskit: Mocha, regular, 2
Croque: Kilimanjaro, none, 0

Excellent!

Here's one,
Gracie - Blend Beans - No Milk - No Sugar


EDIT: sorry, forgot to state that its her perfect matches.

Don Resetti: Blend, None, 3 spoonfuls - Perfect
Gruff: Blend, a little, 1 spoonful - Perfect

First, Bonbon was sitting at the bar, and she told me she takes the Regular amount of milk. Next, Chevre told me she takes no milk. Both match the spreadsheet.

I have the Beautiful town ordinance. I tried to work before 11:00 am but wasn't allowed to. When the clock struck 11:00, I suddenly was allowed to work. That confirms that 11:00 am is the time you can start working at the Roost when you have no Early Bird ordinance.

For those of you who have an iOS device, all the villagers preferences are listed in the ACNL Guide app. It might also be called guide for ACNL. This has always been my go to for coffee making. The app is green with a white outline of a leaf. I'd put a photo here if I could, but I don't know how.

Thank you mrsflamingo! As you know, I'm also an avid user of that guide. However, we try to make our own guides on ACC, and we'd love to have a Coffee guide in addition to all our other guides. We cannot simply take data from others, that would be dishonorable. So, we have to get the data directly from the code, which we can't, or we have to gather the data ourselves. This thread is intended to do just that.

AnnetteSR ok, understand. I'm wondering, though, if you could get in touch with the developer, and ask permission. On the other hand, he obviously did a lot of research , and would deserve to be rewarded. Just a thought.   You've got me wondering now how he managed to get so much info in a short amount of time. For example, he already has all the new amiibo items in his latest update.

For all we know, he could be a member here. Wishful thinking.

Played Barista for the initiative. Not very fruitful, only one new customer:

Bonbon - Mocha, Regular, Two: Perfect

It was 16:10 and nobody was sitting at the bar.

Here is the list of MAIN characters who drinks coffee at the roost  (Disclaimer: This is for the people who work and visitors in your town, not including Town neighbors)

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DJ Slider/ KK Slider -House Blend Beans, No milk, No sugar

Digby - Blue Mountain Beans, No milk, No sugar

Don Resetti - House Blend Beans, No milk, 3 sugars

Dr. Shrunk - Mocha Beans, Just a little milk, 2 Sugars

Gracie - House Blend Beans, No milk, No Sugar

Isabelle - Mocha Beans, Lots of milk, 3 sugars

Kapp'n - Blue Mountain Beans, A regular amount of milk, No sugar

Kicks - Mocha Beans, No milk, 1 sugar

Mr. Resetti - Blue Mountain Beans, No milk, No sugar

Pelly - House Blend Beans, just a little milk, 1 sugar

Phineas - Kilimanjaro beans, Lots of milk, 3 sugars

Tom Nook - Kilimanjaro Beans, Lots of milk, 1 sugar

Tortimer - Kilimanjaro Beans. A regular amount of milk, 2 sugars


Hope this is helpful

Please post any further confirmations on this SFQ thread. Thanks.

Edit: Whoops, I guess that's an early April Fools. Let's try a link the actual SFQ thread instead of this thread.