I voted male. Although, I've only known one girl. She was a doll. When I think about taking a rat in, I think about who I am most equipped to care for. I would never adopt girls without getting them spayed, but unfortunately I can't always afford to spay every rat that comes in the door. And I am also not financially set to deal with lots of mammary tumors. With boys, I feel no obligation to have them neutered, unless it's for behaviour issues. Timewise and moneywise, boys fit my schedule and seem to be my ideal roommates. Someday when I get paid more and have a more flexible schedule, I will feel comfortable having girls.