As a future girl (in the process of transitioning atm), I can safely say without a doubt, the following pet peeve is something I won't be doing:
That thing girls do where they dress like...well, kinda like sluts. super short skirt / booty shorts, midriff bearing shirt / top, etc
Now normally, that isn't really a bad thing, as I'm not one to judge people on how they're dressed...but what really makes me annoyed is the fact that they dress like that, then get all offended when you hit on them / think dirty about them. (I'm extremely shy and "vanilla" irl, so I've never hit on a girl before like that, but a friend comes complaining to me about it).
Like...really woman? Your "clothing language" is telling the men around you "hey, come touch this", but then you turn around and call men pervs / get super pissed off about it and/or do the whole "Oh I want a man that likes me for my personality, not my body" thing? WTF x3
If you want a man to simply TALK to you and become friends with you, dress normally, not like your working on a street corner.