What it says on the tin.
Multiple songwriters/vocalists are good, as are multi-instrumentalists.
Being wise to the industry and in it for the unhinged joy of making noise please; DIY rather than looking to w h o r e the music out right away.
You can see the artists I'm into at my last.fm page: http://www.last.fm/user/lifus_exitus
Hear some rough sketches of songs here, to give you an idea (but not comprehensive) of what I can sound like