Job stability? Reasonable hours? Promotion prospects, without working like a maniac?

Women tend to value those things, often more than men.

Also, women in IT are often undervalued. A boss will assume they have no real talent, for some reason. While a guy who shows any ability will often be seen as a genius. People just don't assume that girls are hardcore hackers, while they assume that any guy who talks the talk (and wears are really bad t-shirt) is. I know I think that way, but I'm aware of it, so I can consciously compensate.