Anime inspired girls? Overload? Maybe I've been mistaken, but my impression has been that the majority of girls have been from video games. Video games originating from Japan, true, but that still is not the same as anime. I think that if you'd count the Fire Emblem, Dead or Alive, RPG, RPG, RPG, Touhou, characters that they'd far outweigh the actual anime stuff. Not being a video game player, I'd personally like to see ONLY anime girls, or an option to that effect, but an under no delusion that that will ever happen.
Even aside from the fact that quite a few English people who watch anime are primarily gamers, with anime as a sidedish, there is also a matter of pictures quantities. Most erotic art for anime appears shortly after airing and then some after the DVDs are released. After a few years most pictures will gradually disappear unless a series was fairly popular to start with. Ongoing series like Naruto and One Piece have a better chance because of their length, but take something like Dual Parallel Trouble or Banner of the Stars and you'll find hardly anything. The latter two were pretty popular when they first aired, but haven't maintained that popularity, so whatever erotic art there was previously isn't available anymore.
All in all, each to their own I guess. Although I admit having difficulty understanding someone wanting porn based off something as badly drawn as the typical Western cartoon, that's still your right.