Best iphone apps, games, etc?

On saturday, I'm getting an iphone 4 for my birthday, and I am wondering what are the best apps? Games (temple run type of stuff), picture editing things (camwow?), and yeah fun stuff!! Also, what is find iphone? i see it on my friends phones and idk what it is haha X) I'm clueless, I've never had a smartphone.... any tips are also appreciated! Thanks!
also can someone explain pandora to me? I know what it is a little bit but im not sure...

For picture editing I use Camera+. It's simple and quick to use, has some nice editing features and sharing options. I have like 200+ apps and games on my iPhone and I downloaded them all here for free and cheap.

yo will love SIRI