In regards to anyone with more focused interests, MySpace is a place to stay away from, if you like to think of yourself as a bit of a Geek, try Sweet on Geek, if you're a Goth, you're out of luck, because most Forums are chock full of wackos, Neo Goths, and normal people, so you'll want to look for a small site rather than a big one. OkCupid is a great place not matter what you're into (And I do mean "No matter what"!
), Gothic Match had an unusual concentration of Metalheads last time I was there, more specifically what I like to call "Black Heads" (Fans of Black Metal), ha!
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"They do, but what do you think is on the radio? Meat sounds. You know how when you slap or flap meat, it makes a noise? They talk by flapping their meat at each other. They can even sing by squirting air through their meat." - Terry Bisson