When I bought my iPhone 6 I also bought the brown leather apple case. It fits well and protects the back and sides well but I kinda think it looks ugly. I am now using a Moshi iglaze XT transparent case. You really have to look close to see that I actually have a case on the phone other wise it looks naked. So far I like this a lot better then the apple leather.
I'll be getting another case, this time the leather one in black. I really like the silicone one, but like I have stated in many other threads, it attracts lint and dust fairly easy. I kind of wish I went with leather to begin with