I put that quarrelsome individual on ignore a while ago. It sucks to have to still see his posts through people quoting him.
When I was a teenager, I wanted to join the military when I graduated but I was scoffed at and told not to be a she-man, etc...
Did you do it anyway? If not, is your bowing to peer pressure the fault of the peers, or your own? I'm of the considered opinion that I'm going to do what I want to do, and so long as it's legal, nobody is going to tell me I can't do it, unless, of course, I'm physically unable to. I'd love to walk out to the drive way and lift my car up high enough to put it on blocks so I could fix my exhaust, but those physical limitations...
Women have been forced to play almost exclusively with male leads for as long as games have been a thing. It's great that you're fine playing a female character, but I guarantee you most games you play have a male lead because most games have a male lead. Can you enjoy yet another male led game if you're a woman? Of course, but it's far less appealing after having been flooded with male PCs since birth. It's also a problem with countless game companies who force their protagonist into that same generic straight white dark haired male with stubble. I am very unlikely to play a game with that kind of protagonist anymore. It feels like if this company is that lazy and uncreative with the main character, how is the rest of the game going to be? Add to that if he's that same cardboard cutout I'm not going to identify with him and that's essential for me playing a game.
Then you have the choice to vote with your wallet. There's nothing complicated about it. I would submit, however, that that's true with anything in life. However, I'm not sure how long you've been gaming, but really, I can't see that a female protag in Mario Bros. would make much of a difference, way back when it was just Nintendo, and you had to blow in cartridges sometimes to get the dust out. I mean, he's so little that you can't really tell, one way or the other.
Choice in one game doesn't equal choice in another, even from the same company. I could have assumed that since I could play different races in DA:O I would be able to in DA2 but that wasn't the case.
How...does a conversation about games=flirting? 
They'll definitely react if it's another man sexually harassing them.
I'd react the same way I do when women flirt with me, I reject them. It's pretty easy, and I've actually had to do it. Of course, I don't consider hitting on me once sexual harassment. If I reject him, and persists, I'll demonstrate my lack of interest by breaking his nose, or his jaw. Back in my day, women used to slap men that behaved inappropriately towards them. I'm not sure if it's a generational disconnect, or maybe the crowd, but in my crowd, even today, if a woman feels like a man is out of line, she's subject to beat his ass.