So far I've got:
Game Dev Story (Don't care for it)
Dungeon Raid (Pretty Fun)
Mage Gauntlet (Great)
Tetris (Fun, but I have no idea why I bought it)
Infinity Blade (Not what I expected it to be, pretty "meh," but it was on sale)
Angry Birds Space (It's okay)
Draw Something (It's okay)
SimCity DLC (Not bad)
Starbase Orion (Not bad, haven't played it much yet)
Are there any "must have" games I'm missing? (Love RPGs if that helps)
Have a look at "squids"
Its a game I really enjoyed that has some light rpg elements (levelling up and exp) but a really unique interface and control scheme that is perfect for touch screens
It's more of a turn based action battle system