CSR Racing is cool.
+1
Hill climb , very simple but very addictive 
+1
Heres a few i have on my iPhone atm that i would highly recommend:
GTA Vice City ('nuff said)
Minecraft Pocket edition (if you like that sort of thing)
Asphalt racing (Arcady brilliance with some cool locations and impressive graphics)
Infinity Blade 2 (hack and slash RPG with
THE best graphics of any game on anyphone)
Mr. AahH!!, Mr.Ninja, Mr. Oops!!, Mr. Space!! (All quick little fun games with high scores to continually beat, awesomely addictive games)
Jetpack Joyride (remember the old helicopter game where you had to hit the space bar to fly up? Like that but way better and crazy addictive)
The Dark Knight Rises (very entertaining, full scale free roam batman game that you can fly about in)
Tiny Troopers (exactly the same as the old 'cannon fodder' from the mega drive just better graphics and a cool level up system)
Flick Kick football (first game i bought on the appstore 3 1/2 years ago and i still have it, best flick shot game out there IMO)
None of them are the sort you said you liked, but all worth ago though, especially as you may fancy a change
