I've had enough roommates across the whole spectrum of humanity to confirm that bad roommates come in all shapes, sizes, and genders. Same with good roommates. There are certain generalizations about living with females vs. living with males that have held up—for example, women do tend to use more toilet paper and leave more drain hair (biology), whereas male roommates tend to be better at changing light-bulbs (also biology) and worse at changing toilet paper rolls (???). And if you date the opposite sex, there is a higher likelihood of things getting weird, romantic, or sexual. But in general, things like messiness, craziness, and a tendency to play very loud music at weird hours do not seem to discriminate by gender. That's equality!
1.) From leroysolay:
I had a series of roommates I sublet to in my apartment that I had for two years. Found them on Craigslist. Mostly folks who needed a place for a few months. Last one was a woman just getting on her professional feet, as I was doing the same since leaving a company to go teach. I was dating my now wife, and she was hanging out with friends and meeting guys.
So one day she tells me she has a big date coming up with a guy she’s really interested in. She wants advice about what to wear, where to go, etc. I ask her to describe him. A few questions later it turns out that I actually trained him at the job I just left. I tell her exactly what she should wear and where she should take him.
Fast forward a couple years, and my wife and stepson are attending their wedding!