(Straight) Men want male-centric power fantasies all the time? Man, that's going to be a surprise to my husband when he gets up. He told me yesterday that he thinks the next Wolfenstein game should have a gender choice. I've lost count how many times he's replayed the current version of the games.
He's told me that he's less likely to buy a game with some stereotypical "male hero," or games like the DoA series, because he's sick of being treated like that's all straight men want. He checks reviews carefully before he buys, especially if it's a game with the stereotypical male appearance slapped on the front. If there is a female protagonist, or someone else outside of the current accepted norm, then he'll still do research, but he's more likely to be open minded.
We've also talked about the ME series in relation to marketing. We were completely on the outside. I wasn't on the forums, and I wasn't reading as much gaming news as I do now. ME2 didn't have nearly the marketing blitz that ME3 did, so it wasn't on our radar. We went into Gamestop, right after ME3 came out. To our eyes, we see what looked like yet another Halo clone, complete with a grizzled space marine. Looking almost exactly the same as every male protagonist in several games in the store.
None of the posters, or the rest advertising suggested that you could even play a female character. It sure didn't help that coupons for Mountain Dew, Red Bull and Doritos were set up as a promotion in that Gamestop. 
I thought that BioWare had gone for the quick money grab of making a shooter with a fixed protagonist. The commercials never showed it was a RPG, much less one that let you choose your gender. I didn't even know until 2012 that it was a RPG, had LGB romance options, and had a gender choice. My friends on the ToR forums told me about it. Otherwise, why should I have cared? The advertising certainly failed on that front.
Yes, had I known that the ME series had a gender choice sooner, it would have affected my purchase. I would have been less likely to treat it as a space marine clone, and instead a game on more of it's own merits. A big reason is because much pretty all of those "Space Marine" shooters don't offer a gender choice or have a female lead character (outside of a few characters like Samus,) especially back about 3 years ago. Just that knowledge would have gotten me to at least try ME1 a lot sooner than I did.
Now, with all that said, I can see the value in more ambiguous marketing. It worked well for Inquisition, and it worked well for NWN. I think focusing on the armor and the symbolism of the character, rather than the looks, is the safest and least controversial way to go.