I have tried three cases so far, the Griffin Reveal, a case from a Cellairis kiosk (I quickly returned it) and finally, the Speck Candyshell grip. I am currently using the latter and I really do like it. What cases are you using, if any?
I have tried three .. First, on launch day I purchased the Speck Candyshell .. It felt cheap to me, and I didn't like it very much. I went to Best Buy and got a clear TPU case by RocketFish. I like that one very much, it's my minimalist case. Since it's clear, I can show off the iPhone 5 and it's not bulky at all, but will protect sides and back from being scratched. Finally, I went back to AT&T and returned the Speck to exchange for an OtterBox Defender (only paid a $9.74 difference). The OtterBox is awesome, much better than previous model Defenders, the silicon/rubber is very smooth and doesn't collect lint like previous models. The bezel around the screen is pretty high, so typing with it on takes some getting used to, but it's definitely very sleek (for an OtterBox) and it's the case I'm using 90% of the time now.
I know longer worry about bulk for cases..so the otterbox would be fine except I don't want to cover the back with something not clear. I am between the clear rocketfish or griffin reveal. I get my phone tomorrow.
I just got an Incipio case in the mail today. Very nice. Super thin with a slight rubbery feel to it.