I'm male and prefer to roleplay with other males, so what's the big deal? It's no different than wanting a partner who posts five paragraphs instead of one, or wanting a partner that posts seven days a week instead of one. It is a preference and another case of "to each their own".

To be more specific, I can often notice a difference in a male playing a male and a female playing a male. Also I've had bad experiences in the past with what I call "annoying yaoi fangirls" and that's not something that should be held against me. It's not a deal breaker for me, but I give preference to males in the end. I really don't see why it's such a big deal.