I do think that this is a personal question that would be answered differently for each person, but in general women tend to desire closeness and a more emotionally attached relationship more than men. Though both men and women seek "sexual satisfaction only" relationships, I would tend to think that more men would want this than women. On the flip side, though both men and women seek "emotionally meaningful" relationships, I would think that more women than men would want this. Which, if your relationship is emotionally meaningful, would probably lead you to want to meet the person in real life, eventually.

I know that for me (and for many women that I've known), without emotional attachment there is no sexual satisfaction, the two go hand in hand. Though I have had emotional attachment from online relationships; in fact I met my little one online (though at the time we were trying to be vanilla. Ha!)