Honestly, I always seem to think that people who are cat guardians are more interesting that people who have other kinds of pets or no pets at all. This is definitively not a trait I would attribute strictly to men, but since I am a straight female I guess I can fall into that category. The way cat people are portrayed in media is just more interesting than other people. They are often intelligent, creative and generally interesting. And, strangely enough, a lot of people I meet that have that characteristics are cat lovers. I guess that cat men might be more popular than cat women because of the whole "cat lady" stereotype, it's a common joke in less quality media to let the audience know that the woman is single and lonely by getting her to talk about her cats like they're her children (implying that the only reason she has them is the lack of family). I haven't heard a similar joke directed at men. But that's really a different thread, sorry for rambling. ^_^'
The usual stereotype for men who have dogs is either friendly or tough, and pets like snakes, lizards and spiders are just tough. Guys that have cats might be more sensitive and intelligent, that might be the main reason for the popularity.