Reccomend any good iPhone apps?

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Okay, so, I got my iPhone a few weeks back, thanks to an upgrade, and I'm loving it. The only problem I have is apps. They bore me way too quickly, I've paid for a few now and I don't feel like I'm getting my moneys worth. It's an iPhone 4, not a 4S and i dont care if they're paid apps or free apps.
So, are there any apps you would care to reccomend?

The apps I have are:
Facebook
Twitter
Tumblr
Soundcloud
Instagram
Facebook Camera
TuneIn Radio
TV Guide
TonePad FREE
Shelf BG
Fruit Ninja (paid)
Jetpack Joyride
Monster Dash (paid)
Age of Zombies Anniversary (paid)
BlastOff (paid)
Draw Something (paid)
Touchgrind (paid)
Touchgrind BMX (paid)
NFS Shift 2 (paid)
GTA3 (paid)
Subway Surfers
Bezerk Ball
Temple Run
Photoshop Expresws
Cracked Reader Lite
Flashlight
Lloyds TBS mobile banking
Mmembase
Wallpapers
Phonto
Pixlromatic
Last.fm
eBay
NERF

And it's not just games I'm after, just anything useful or great.

any suggestions will be tried out as i'm an open-minded gamer