Quest for Glory from the early 90's. Good games. It's got soul--there's all these extra details that the developers didn't -need- to add, but were added anyway because the game makers were having fun. That's something I like in a game.
Oh, yeah, and I downloaded Paper Mario on the Wii, and the Banjo-Kazooie games on the Xbox. I mean, ten years ago for most of them. They have some nostalgia value (I'm going to be 24 in a couple of months, which is why I'm old enough to want to replay PC games from the early 90s).
Apart from that, I'm just rebuilding profiles on the 360. I had played Mass Effect, Assassin's Creed, and Bioshock on my old roommate's 360, and then he took it with him. With the help of a job, I got my own 360. As he pointed out, any game he makes in Mass Effect will be fun to play what with all the shield and health and weapons bonuses I unlocked for him.