Absolutely not. I don't play games based on the sexual orientation of the playable character, especially if it is both insignificant and irrelevant to player choices, and I see no reason for a game to specify that the protagonist is gay other than to pander to people who whine about the lack of gay protagonists, and that whole argument bores me....
Seriously, how would it help, say, super mario brothers if the character was gay and princess peach was instead prince potato? It's a stupid change to make and any game that relies on such a 'controversial' theme to get some attention is almost definitely a too poor of a game to draw attention based on the merits of its game play. I mean, sure, if it was a fantastic game other than that then I'd probably play it, but I just find that somehow hard to see how that kind of stunt would risked on a legitimately good game, and I see no reason to hurt the classic series with this no age, equality bullshit. If you want to play as a gay dude/chick, go ahead, I don't give a shit, just don't force it on already established games...And for the record, I'd far prefer a generic space marine blowing the crap out of things than a romance driven (gay or straight) FPS where I'm supposed to be more motivated by my love of some anonymous digital character than I am for my love of blowing shit up.