This question comes from Poncho95

Have you ever done anything you wish you shouldn't have? If you could go back in time and fix one mistake you had made, what would you change?

I regret things I didn't do more than things I've done.

I can't think of much I'd change, but I have a few ideas.
It wasn't a mistake on MY part as such, but if I could I'd go back in time to when I was 10 and my puppy Jess got killed on the road. I wouldn't let her off the lead and when the irresponsible people and their greyhounds arrived, I'd give the greyhound a good thwack with a stick before it attacked Jess. >=(

Aww Aoife.

I'm with Aoife on this question. I'd regret not doing things more than what I did. I'm usually the quiet, tries not to annoy anyone, so consciously I'm quite good at avoiding things I'll regret. But plenty of times I've let things like my fear of heights get in the way of trying something.

I third what Clarise said, a lot of things I regret not doing.

Fourth it!

Although I regret quitting piano lessons 3 years ago (I started when I was 8). Then again, I'm already stressed as it is, so maybe it was for the best.
Besides, I'm at the point where I can learn music on my own. Still, there's always stuff I could have learned/improved upon.

No regrets!! I don't believe in them. Every decision I made (or didn't make) has become an intricate part of the fabric of my life; made me who I am. I believe in focusing on the present and looking forward to the future! And seeing as I believe in the multi-verse theory, there's lots of other "me"s out there that are living different lives anyways!

Oh, and since I'm totally afeared of the "grandfather paradox" I would never travel back in time.

I'm in the same boat. I have no regrets for what I've done or what has happened to me be it good or bad. There's not a what if. I don't think clinging on stuff like that will ever solve anything. I'll do things as they come; I'll worry about taking good decisions, but whatever comes my way and I feel like doing I'll follow.

I can't say I have regrets for things that I have done. Like others, I would have regrets for things that I didn't do. I don't dwell on them but sometimes wonder what would have happened, how different would I be if I had gone ahead and did something. For instance, as much as I like to sing-a-long to the radio in the car all out of tune, would I be able to carry a tune if I had joined the school choir in elementary school when my music teacher asked me to? If LadyKathryn's theory of the muli-verse is true, perhaps there is a me on Earth 616 that has a great singing voice On this one one, not so much.

Like most, I can't say I have regrets, what I did or didn't do, has made me who I am today.
I'd probably want to go back and do something differently, but I'd wonder how that would affect the now and i like the now right now. So as long as I could have it go back to the same as it is, maybe I would just see what a change would have made.

Of course I have regrets but I would never learn from my mistakes if I didn't make the mistakes in the first place. Besides, I've totally seen the movies / read the books where changing something about your past has affected the present. At the moment I quite like the present so don't really want to change it if you get my drift.

I don't really think I have any regrets. I like to focus on the present, like LK. ^_^ Dwelling on the past will get you nowhere.

Not to be that bandwagon guy, but I'd have to go with LK and Ryan here. I'm not really a regretful person at all. I can't even recall regretting things, as it's just natural for me to look towards the future.