The other issue to consider is the traffic that's seeing your content. It's entirely possible that your scenes are perfectly fine, but the traffic to your site or VOD or whatever aren't looking for gay content and therefore aren't really interested in looking at it.

Another element: According to the people I've talked with at GFY, straight porn typically has strong dominance of the male over the female and a lot of dirty talk that shows that dominance ("How do you like this you little slut? Take it harder. I'm going to cum all over your face"... that sort of thing) because the straight male wants to fantasize about dominating the female in the scene. Some gay content still has some elements of that, but except in certain niches, on the whole it tends to be less dominant We've all seen some disastrous tours where straight webmasters attempted to apply the same techniques/language/terminology from straight tours to the gay market... and then wondered why it didn't convert.

If it's physical product, box graphics make a tremendous difference as well.