Highly recommend Shovel Knight. Clocks in around ~7 hours. The Metroid Prime games are highly regarded, and for $20 it's a great deal. Wind Waker is always a great buy. As for VC games, I would recommend:
Earthbound Super Metroid Advance Wars Donkey Kong Country 1-3 Super Mario World Kirby Superstar A Link to the Past Paper Mario Fire Emblem: Sacred Stones M&L: Superstar Saga
I'd really recommend giving EarthBound a try if you're interested in it. It's predecessor, EarthBound Beginnings, is also a good game to try out, but I'd recommend playing it after EarthBound, since it can be a little rough around the edges at times.
Animal Crossing: New Leaf