Many an iPhone owner will probably nix the idea of an iphone case altogether, because they don't like the idea of covering it up. There's even a site dedicated to fixing
iphone scratches that gives reasons for
saying no to an iphone case.
Quoting from the post:
"Its a big shame that people would smother a beautiful iPhone inside a third party case. …just not right. Sure, the iphone will probably scuff and scratch , and get nasty fingerprints on it. Especially if you’re dropping it or carrying it in your pocket with your keys. But, unless you’re housing ultra-secret documents on your iphone and plan on smuggling it through a third-world airport checkpoint inside your anus, I’d forgo a stupid case."