I guess I will name some of the most popular maturer anime's in the OP, but we can talk about any & all maturer anime's in this thread.
I think these images are fine:
Angel Blade
Mahou Shoujo Ai
Jiburiru the Devil Angel
La Blue Girl
Bible Black
ikusa Otome Valkyrie
(more to come to OP to name the most popular ones on the web)
1) Absolutely no embedding of any nudity, female or male.
2) Nothing featuring minors
3) No links to pornographic websites or videos. Links to images are fine. Embedding of images is not fine.
My rule(s):
Refer to it as "maturer anime"