The same things that I look for in friends, cause any relationship has to be a friendship too....
Intelligence, or at least common (?) sense. A cheesy sense of humor, similar tastes in music (no rap or bunny rabbit music). But most important, similar interests. I seem to be stuck in the past on most of these....Buffy, Xena, Dungeons and Dragons, computers, basically, think your normal geek/nerd and add a bit of darkness.
Interesting, putting it down this way, perhaps I've found the reason I've gotten out of touch with almost all my old friends and have a hard time making new ones. Trying to find people who are still in the past is harder and harder every year. But, I'm happy there. I just can't seem to get into the new stuff out there nowadays.
And for the second part, available both for friendship and otherwise.