I design and I don't like them, but clients insist on them against my advice over and over. Clients routinely take informative sites and want to pare it back to minimal information, because they don't like having to write text or maintain anything. Or hide navigation because it feels like cleaning up. You'd be amazed at the ridiculous things they insist on even when there is logical or industry best/decent-practice suggesting otherwise. It's very frustrating.
