Maybe it's just me but all this talk about Adult Anime is a bit ironic. The closest thing recently to an adult Anime would be basically some drama without any need for some flashy battle scenes or extreme amounts of gore, violence, nudity, which would be a title like
"Εoku: The Inner Chambers".
The real appeal about Anime to someone who is an old school Anime consumer like me is the fact Anime is widely not a medium that is suppose to be taken that seriously. I consume and collect Anime as a form of escapism. Being someone my age who consumes Anime still actually makes me feel a tiny bit younger knowing some of the people I know in real life do not have such vises to cling onto who are the same age as me. Even some of my friends I use to play Halo with in College when there was no online play (you had to get a group of people with multiple Xbox consoles, multiple TVs, and do a lan server setup where everyone was basically in the same room just to have death match battles) don't even play Video games anymore because they simply grew out of them and any relation to video games these days they have are mainly focused on getting new games and consoles for their children instead.
Even back when I was in Highschool, The 1st time I ever experienced lan server Death match gaming was when one day our electronics/CAD instructor (I did a two year vocational training program in electronics/CAD where we had about a dozen students from all across several schools in the area meet for classes during part of the day) set up all the computers in the room to be connected to each other and we had a 1993 DOOM death match the entire time we were suppose to be being taught. It was meant to be an educational experience for us to see the potential of what computer networking could accomplish in a practical sense (This was done when windows didn't even exists and everything we did on computers was always done using DOS).
I guess the the point is for an older viewer, Anime is suppose to make one feel young which is why so many Anime titles are not typically adult oriented. While I encourage and welcome "true" adult Anime material in this medium, the fact that people just get older as time goes by, trying to target an adult audience does not always equate the need to pump out a flood of "adult" material.
As a fairly recent example I find something like
"I Got a Cheat Skill in Another World and Became Unrivaled in The Real World, Too" oddly entertaining to watch. YES, this Anime is complete trash for what it's worth but it's the fact it's the epitome of a male power fantasy just for the sake of a male power fantasy and nothing more makes it so interesting to me. This Anime title goes no deeper than that and oddly I find something like this humorous to watch as well as entertaining.