Sex is important. Like a woman who is not afraid to initiate that.
But there is clearly more to it than that. Positive attitude is a big plus.
One of the things I find most important is a woman who wants to give and receive affection - hugs, holding hands, I love yous (don't make me turn in my man card, but I think that's important). Maybe it's because that has been missing in my M, and due to the sitch I am forced to think about what I do/don't want if I have to jump back into the dating pool.
Last thing is communication. Again, something that has been missing in my M.