If you have cats, you have to try FoxTail. It's an awesome app that makes sounds and your cat will react on those while tap on the screen by him/herself. :3
The eBay app is nice, makes it so easy to buy shit you don't need on the go.
(Believe it or not, sometimes you just end up sitting somewhere really bored, browsing eBay, finding things you'd normally not see).
And of course, you gotta download Phantasy Star II.
Angel Clock is a super cute alarm clock you should try. :3
- Pic Stitch
(Useful: Make a collage of your pictures, choose between tons of layouts)
- Finger Zoo
(Cute: Super cute decoration app for your pictures, with adorable animals in it)
- Manga Camera
(Awesome/Nerdy: This one is a must try. I believe it's new, and it's quite fun!)
I have a lot of cool RPGs to suggest but they're only available in the Japanese iTunes. Let me know if you have a Japanese account and would like the names!