That Super Mario Bros. cover is just freaking cute. XD And yay for genderswapping covers. I think a book's cover should match its genre, not the gender it's "for". Romance novels with frilly flowery covers? Hell yeah. Porny novels, though...maybe some nice gender-neutral shiny crimson and black. Sleek and sexy. :D

I'm just glad the classic novels I've read tend to have plainish covers, or ones artsy enough to go either way.