When work sent me an iPhone, I bought the cheapest case I could find - "Angry Birds Space" at Best Buy for $6.99. When that broke, Scott Ridenour gave me his old one at DRE. I really liked that one. When that broke, I found a $.99 cent one at the Mennonite Grocery here in town.
For my daughter's birthday I told her I'd take her to the kiosk in the mall to buy a blinged-out one; where I found myself a contoured, comfortable-to-hold, rubberized-interior hard-shell. Its like a stormtrooper. My son liked it so much he got an identical case - in black. Maybe he can be Darth Vader?