My wife is a tiny thing who drinks pretty much only my 70+ IBU, 8+% ABV beers. When I brought home a 10%, 100+ IBU IIPA and warned her about it, her response was pretty much "so what?". Now, she's not a heavy drinker, but she likes the flavorful, bitter beers. And many of the women beer drinkers I know around here are like that. So I wouldn't make any gender based decisions. Just get a variety of good beers and you should have something that will cover everyone.