I voted but not sure if I replied, so in case I didn't:
I've played female characters pretty much exclusively ever since the games I played started having a gender choice. Like many others here, I've come up with many excuses, both to my friends and myself, as to why I play female characters. I think WoW was the first game we played where gender was a choice, and the first character I created was a girl. Oddly, I didn't even think about the decision, it just seemed normal to to play female. All my friends had created big butch male characters, and teased me about picking female. In a rare blast of wit, I said to them "pft, you're the ones running arround staring at a dude's arse for 8 hours at a time, and you have the gaul to call me gay?"
they all changed to female characters by the next day lol. Obviously at that time, I was still labouring under the myth that "a guy who wants to be a girl = homosexual", which obviously I know now isn't correct. It wasn't said in a nasty or homophobic way either (we've always been a pretty liberal bunch), it was just that none of us identified that way.
Since then, I've played female characters exclusively whenever it's been a choice. When it's not and I'm forced to play a male character for whatever reason, I do feel dysphoric - particularly when it comes to connection to the character. The female characters I create / play feel like a part of me, like a true extension of myself and my personality. Male characters just feel like a tool that I'm manipulating in my hand. No connection what-so-ever. Not that I don't feel empathy for well-written ones, but my brain just registers them as "someone else", whereas with female characters, my brain registers them as "a part of me", if that makes sense? I always give my female characters a rich backstory too, whereas my male characters are "just there".
Incidentally, these feelings are one of the three big things that clued me in to the possibility that I might be trans*. I feel so normal being a female in the virtual world (particularly including when it comes to social interactions), it's frankly mind-boggling that I managed to deny that this existed in me for so damn long. And that's without even taking into account all the non-videogame role-play fantasies that used to swirl around in my head in the years before that lol
<3