I posted a while ago and the number has gone up in this house. I am female and currently have 16 snakes that are my own, and I am watching two for one friend, and one for another. Those two friends are both female. So right now I have 18 snakes in the house with 5 eggs in the incubator.
If I get the hatchlings I want this season and I'm able to purchase the ones I want this season, I plan to have over 20 by the start of 2012, and that doesn't include my friend's snakes.
It is interesting you bring up if males keep snakes exclusively and females keep multiple species. I keep snakes as a hobby, but I also keep other species including ferrets, cats, a dog, a cockatiel, and fish.