I'm a huge costume and unbranded jewelry fan. Anything from handmade lucite earrings to vintage brooches to ceramic bead necklaces: I think it's a lot of fun to pair jewelry with outfits and I have an enormous collection of inexpensive treasures. (I'm not talking about disposable Forever 21 stuff but the $20-150 range: not plastic, but not gold either.) The real gold, pearls, etc don't get nearly as much use.
I prefer high-end/designer clothing, shoes, and handbags, but other than a few "genuine" items like rings and diamond studs, I feel that I'd rather have inexpensive fun jewelry, chosen for its design, than items that are identifiable, have logos, or are simply "blingy" (eg a giant diamond engagement ring). To be totally precise, coated metal items like Hermes Clic Clac are also "costume" jewelry, but they're logo-d in a way I don't prefer, so I'm talking about things chosen for their design, that no one should recognize.
Does anyone else wear costume jewelry? What kind? Why or why not?