1. Grand Theft Auto: Vice City
Favorite GTA game, overall a ton of fun
2. Donkey Kong Country
I have tons of nostalgia for this game, and as much yang some people have said about it, still holds up in my opinion, oh and it have an amazing soundtrack
3. Mass Effect
Haven't played the second one yet, but the first is amazing, and I didn't have as much problems with it as others did.
4. Final Fantasy VII
Another title that I have a bunch of nostalgia for, although playing it recently I can recognize its flaws, despite that still a super fun game. Another great soundtrack as well.
5. Day of Defeat: Source
A really fun multi-player game, that you can play forever.
6. Tony Hawk's Underground
Wait other people didn't like this game? I however loved its story and had an overall great time with it.
Fun western game that I had a really good time with, story wise it was pretty interesting and the combat stuff was great, although it did lift certain aspects from Red Dead Revolver.
8. The Godfather: The Game
Loved being able to play in the godfather universe, really cool game.
9. Dragon Age: Origins
I feel slightly uneasy putting this on the list only because I haven't beaten it yet. Otherwise if it keeps up this pace it could easily be my favorite game ever.