Well my favorite game is to play Car race on face book .In that you having lots of time to finish the levels and time to time it will reduces to finish the levels.
CityVille all the way, but there are also some other interesting games that require more skill, not sure what there name is, but there are lots of fun games on FB
I used to obsessively play Kingdoms of Camelot, but it started to take over my life so I had to go cold turkey lol
I used to play mafia wars all the time but since Zynga started with all the pop ups ive dropped playing it. I was a very high level on the game as well (I think back to all the wasted time play the game lol)
Farmville farmville farmvillle..... Love it really. And the english country side of farmville is just stunning...wao zynga...!!!
I was addicted to Ninja Saga game I left playing it now coz FB's games are really addicting, not because they are cool (which is so-not-true) just because we are racing with other people with our levels (the fact why everyone is addicted lolz)
i LIke the mafia wars. I do hope they develop a game something like ragnarok. it would be fun to play that kind of game.
I've been a zynga lover, and my all time favorites are farmville, cafe world, typing maniac and I forgot that one apps it's about rockstars hehe