I keep my coins in a small leather coin purse, keeps them from messing up my wallet and its contents.
Other than that, I just use plain black wallets. Usually hand me downs from my father in law who seems to buy them in bulk and then gets tired of them after a week or two...
I bought a wallet with a Slayer logo a couple of years ago, in a last ditch attempt to regain my lost youth, but it was too small to contain my season ticket for public tranport, so a lot of good it did me...