As a one-time or short-term fling? Attractive, clean, tolerable personality.
Longer term, more more concerned with personality, intelligence, and compatible interests.
Their literary fluency. (Writing skills.)
If they're funny because I love to laugh :).
Seriously? She's got to have excellent hygiene.
looks i guess but they're not that important, a good(compatible) personality is a must.
Is he breathing?