I usually write male characters.  Like almost exclusively males.

Humans, halflings, Orcs.  Doctors, grunts, cowboys, drunks.

Pretty much always dudes.  

Never had a problem with writing as a woman.  Just haven't done it.

How fucking boring would RP be if we all just RPed as ourselves?

Most of us have never shot a weapon.  Many have never been in a fight.  I've never been Captain America personally, or a Halfling looking to throw some jewelry in a Volcano, or an alcoholic Orc Monk with anger issues.

If most of us were RPing as law abiding 9-5ers shit would be boring as hell.  Writing about doing what you already do every day wouldn't be much fun.  Very little escapism in that.

Right now I've got a female character idea I'm kinda toying around with and it's pretty fun.  She's a young, somewhat promiscuous, likely bisexual, Halfling pirate who  is trying to overcome what she perceives as her generally cowardly disposition to make something of herself and live up to the legend of her brother.  Maybe even find him and join him.

I usually don't write as women but I think it's good as a writer and just as a human being in general to try to write diverse characters and explore diverse mindsets and backgrounds and all that.  The ideal being to be able to see the world through anyones perspective and write convincingly in those same perspectives.  The inverse of that, the thing to be avoided, would be being quite set in your ways and perspective and incapable of considering or writing in any others.  That would be some old bullshit.