PL O8 kills fishes pretty fast if there's a few sharks around.

I'd say the best game for fishes is probably PLO (or a limit omaha game. As many times as I've lost huge pots by runner runner I'd go with that. (unless they move allin with any flush of course)

For rocks, it's all about who's at the table not so much the game I think.

Calling stations--any form of limit poker because they're getting better odds to chase.