Bisexual male here.
When I first started MU*ing, I played female characters exclusively. This
was after I discovered (quite by accident, after creating a character with a
gender-neutral name) that female characters get a hell of a lot more
attention than male ones. This was in late 1996/early 1997 and being openly
gay/bi wasn't cool back then, so I became OOCly female as well. This had
the side-effect of allowing me to talk a little bit about RL stuff without
weirding people out. For example, I remember telling the story of how I had
sucked my date's room-mate's dick while I was waiting for him (the date) to
get out of the shower (he was in there for a good 40 minutes), and became an
instant hero to every guy on the game. To an attention starved, lonely,
confused scrawny bi kid stuck in a hellhole college where he didn't know
anyone, this was like mana from heaven, and I had a blast with it.
At least for a while.
Then I got tired of the BS.
You get tired of people assuming that just because you were willing to RP
with someone that you must be willing to fuck them, too.
You get tired of nearly every situation in which you find yourself alone
with a male on a game, turning sexual, no matter how hard you try to steer
it in other directions and no matter how inappropriate/unlikely the
relationship might be from an IC perspective.
You get tired of being stalked, watched and monitored because apparently
women cannot be trusted to not turn into whores the moment their man is not
around to keep an eye on them. It's amazing how quickly you can go from
being the big damn hero, to being a dirty whore. All it takes is RPing with
someone that your partner doesn't like or feels like he is competing with.
You get tired of dealing with supposed adults who don't seem to know
anything about women. I'm talking zip. Squat. Nada. Rien. Nothing.
It's not like I have any special insight into it being a man and all, but
some of the things I have had people tell me during TS made me want to shake my head in bewilderment and shout "WTF, dude, are you even from this
planet!? A woman's body doesn't work like that! I suck dicks and I know
that!!"
These days I find that I prefer to play hetero male characters. I usually
try to avoid relationships, but there have been a few situations in which a
relationship grew organically from RP so in those cases, I discussed it with
my partner so we could mutually decide, in advance, where things were headed and how we were going to handle it.
I have never explored gay male relationships online and I probably never
will, and that's because I am in a RL relationship with a wonderful guy and
I don't feel the need to vicariously explore that side of my personality.
P.S. Sorry if this rambles, but I am a bit drunk.