hmm !!! i get what you mean... just i don't like Hentai...
i know it stills been ANIME... Hentai is just the category .... but I still prefer to call it just Hentai insted of Anime.... just my opinion
about the stories, since i haven't seen those, only Mezzo (the sencored one ofcourse) i accept it had a great story, the I saw the Mezzo dengerous service TV anime. and was great... i think if some hentai like that exist, i coudl agree that some others have great stories... just maybe i'm like TOM have to be something of my religios believes...
most of the animes I see are really violente, lot of gore and some wiht nudity... just that all those have great stories.... including the normal animes that don't have all that but still with great stories.... i end up liking the animes for the drawings and story... just can't bear the complete Hentai... thats way to !"·%&/ for me...
like the one you have the avatar.. Ikitouse, DD, GG and the special had a LOT of nudity but great Story....