What kind of headphones/earbuds do you use?

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Just got these monoprice enhanced bass hi-fi noise isolating ear buds. They're $7 fuckin dollars but are way better than most $30 headphones you'll come across.

I don't use over the head headphones simply because I think it looks stupid wearing them out in public, but I'm thinking of investing in a pair for my own private use. I wouldn't know where to start though.