Not to say that women haven't been great housemates, they have. Just that the ones I like seem to leave fairly early on a lot of the time. I've been impressed with most of BB13s females so far though. Even though I really dislike some of them, they are a zillion times more interesting to watch than BB12s.
Don't think I have ever actually had a female as a favourite though from any series. My favourites are usually men and my top ten only includes Makosi BB6 and Bea BB10. Even those two though weren't my overall favourite housemate of their series, although Makosi was before Science took over. It's still early days, but BB13 could end up being the first.