I'm hooked on Counter Strike Source at the moment, and I play through Half Life 2 whenever I feel like I really need it. To be honest, it's a fun game, but it gets really frustrating and dull after a while, like in the part with the sentry guns at Nova Prospekt that takes a billion tries to finish. I can't wait for Half Life 2: Episode One!
I'm also playing Guild Wars from time to time, though that's only when I'm extremely bored and I feel the need to do excessive fetch quests... mostly if I feel the need to play an RPG, I play Elder Scrolls IV: Oblivion, which is the best RPG I've ever played.
I also do Warcraft 3 and the Frozen Throne if I want to do something like Line Tower Wars, but the campaign in that is too boring and regular online matches aren't very fun because I always get crushed.
![Very Happy :D](./images/smilies/icon_biggrin.gif)
I tried the Sims 2 for a while, but it didn't really click with me. Micromanaging every aspect of a person's life isn't really easy, and it's also not really fun in my opinion.
There's also another game... Thinktanks, it's called. I play that one only if I'm completely bored of everything else, because the people on it aren't very nice and it's boring anyways.
And who can forget Lugaru! I play that one whenever, because the demo never gets old... I still have yet to purchase it, but I think I'll hold on that until I see Lugaru 2.
![Razz :P](./images/smilies/icon_razz.gif)