I support you and your hobby, but I should not show sexual content to a group of people, people tend to agaisnt that in this case. People tend to like this kind of thing: http://prntscr.com/djlviy
In my opinion, Hentai is art, as it is drawed by artists. You are right when you point out the feeling of the character in the above image, that is the work of the artist, they/he/she put(s) their time, soul into their work so people can feel the soul of the image, the feeling of the character in the image.