Most m/m e-book covers can be divided into two groups - the hot, nekkid man-titty covers (i.e. typically bare chests with the guys' heads cropped out of the image) or covers that include the guys' faces. I love man-titty covers, don't get me wrong. Three of my four released books have them, and I even asked for naked man chest for Object of His Desire's cover. I think historical covers are more difficult for cover artists because there aren't that many images of hot men in period clothing in the more popular online image databases. So when I fill out my cover request forms, I usually give the artist the out and indicate that man titty is fine and dandy with me. Plus, I firmly believe that hotties on a cover do attract a reader's attention to the book, and perhaps some of those readers will buy the book. A cover is, after all, a marketing device. However, the cover artist (April Martinez) for Convincing Arthur surprised me and not only put clothes on my heroes, but also, and more importantly, showed their faces. And that cover has become my favorite of all my books.
So what about you? When it comes to m/m book covers (not my books, but books in general), do you have a preference? Are you in the headless man-titty camp, or do you prefer to look your cover hotties in the eye?