If I haven't fired you yet, it's because I'm still firing your mom in bed.
Hill Climb Racing
Defender II
Asphalt 7: Heat
Dead Space
N.O.V.A. 3
Google Wallet
Osmos HD
Nuke SMS
Pulse News
Sentinel 3: Homeworld
WifiKill
tTorrent Pro
GameBoid
These are on my Android by the way if you didn't notice; but if you're looking for games OP, then most of the games I listed are also available on iOS if I'm not mistaken (and if that's what you're using). To highlight my favorites of this favorites list, as far as games go, then:
Currently, I've been playing Hill Climb Racing the most, followed by Asphalt 7. All time favorite would have to be Sentinel 3, even though I rarely play it anymore. If you're into tower defense, Sentinel 3 is worth the money and then some.
[Edited on 01.03.2013 4:52 PM PST]