Favorite iPod/iPhone apps, definitely too many so just going to list a few...
Draw Something
Angry Birds
fruit ninja
iChat
bejeweled
tetris

Angry Birds was my favorite though. So addicting and always had to completely ace it to move on to the next levels. Found it through this site not long ago actually Apps Verdict
They had this awesome walkthrough promotion as well, which made the game a lot easier and I finally beat it, haha!