What kind of games do you play most? Titan Quest is great, but if you don't like point and click RPGs, like Diablo, then you might not like it. RACE 07 is great, but you have to like racing sims.

Lost Planet is kind of fun, as is Battlestations Midway. If you like turn-based games, Civ IV is really good. And, don't write off Bioshock, because it is a shooter.