I love my s style tpu case, nice protection with very minimal weight and size. I think they cost a dollar or two on Amazon. Plus it protects the camera so you can put it down on a table without worrying about scratching the camera lens up.
Sent from my HTC Evo V 4G
I'm not a fan of TPU and find the Otterboxes to be a bit overkill. The cheap rubberized plastic shells on eBay are actually quite good. I've had a few hard drops and they took the impact very well.
Example: Snap-on Rubberized Black Hard Skin Phone Coated Case Cover For Sprint HTC EVO 3D | eBay