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My vote is for the Evutec karbon SI. Very grippy, scratch resistant and thin and protective.
 
Very hard to answer that without insight into what style you like, type of case you're interested in, how you used to carry, what size hands you are, etc.

If you give a few more details, it'd be a lot easier to recommend, as everyone has their own favourite based on their own tastes!
 
Yes, so many type to choose and hard to recommend without any suggestion...mostly,there are big brand such as otterbox, spigen, verus, case-mate, grovemade, ESR, Maxboost, Arozell should meet your style if you're not too much personality...
 
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