Yeah it seems most people have trailed away from the thread and are just posting their favorite games...
As for me... well I used to play Bejeweled 2 a lot but I eventually got tired of it, Peggle is great too and so is Zuma, Vista's games are always nice to load up from time to time.
Right now I'm really hooked on Dirt Bike 3D, it's a little mx game, it's pretty simple but fun (google it), I just like to open it up and ride a track or two before I get back to whatever I was doing.