Either Isotope or Flight Control (have been playing the latter a lot more now that they've added bluetooth multiplayer!)
You must know Barney Stinson. Oh And I have probably Racked up the most time on DDR S, Defender Chronicles and Monkey Ball.
not really any?? I usually have a very high turnover rate with my apps. My current favorite is Cartoon Wars haha. I would recommend everyone get it!
I think Lux Touch has gotten the most play time on my iPhone so far. Although I Dig It is quickly closing the gap. And I suspect that SIIG will be getting quite a bit of play time in the future. Robot Master and Airport Mania probably round out the bunch.
baseball superstars and doodle jump are my favorites. i also put a lot of time into fantastic contraption
Archibald's Adventure or Chocolate Shop Frenzy EDIT : Wait a min.... May be CarJackStreets, Can't tell.
Galcon... ALL THE WAY! Lux DLX had potential, but they got lazy and never included online multiplayer.