In my opinion, females tend to show a biased vibe of the male gender in general when they rp as a male character. That said, I personally prefer that they stick to their gender.
But that's just my preference, I honestly don't really mind it either way.
Assuming that by "biased vibe", you mean "stereotype" - I disagree. It's only those who haven't full worked-out kinks in their male OC's that do that.
I, myself, have a few main males that I play as, apart from my main females. I don't go around looking for mates when I'm a dude, but if it happens it happens. I try to keep my male chars away from stereotyping "ALPHA TOUGH DUDE RAAWWRGGGHH NO EMOTIONS RAGE TESTOSTERONE I NEED A MATE BECAUSE THAT'S WHAT GUYS DO LIHGIUEKHGJKSE STEAK" as much as possible - again, assuming that's what you meant. My males range from megalomaniac and posh; to brain-damaged and delirious; to a young reluctant leader - and a few other personas. You can't say that those are particularly common personalities, either.