My obsession is with minimal cases that are barely there. I was using clear or grey TPU cases for a long time. They nicely show off the iPhone and are practically invisible. I have tried out over a dozen cases since and my current favorite is the Scarf by Totallee. Very minimalistic. Had it for some time now and still looks great. I use it together with a thin tempered screen protector for some extra protection. Like the slimness of this combo.