Quote (Blackstoneman @ 4 Feb 2013 19:55)
Cossette no Shouzou
Mononoke
the first part of Memories
Perfect Blue
And maybe Texhnolyze. Its not really horror but pretty dark.
I dont understand the other suggestions tho. He asked for "adult anime" and you name stuff like Mirai Nikki DW and Another.
Perfect Blue is a good example

Sorry if I'm difficult to understand. Thing is - I watched 'Monster' years ago and haven't been able to find anything that even comes close. Everything has cutesy animations and childish or bland dialogue... There are some good animes out there. Deadman's Wonderland was pretty awesome. But it still had all the cutesyness.
I will watch and enjoy things like that - but I'm really looking for stuff that looks realistic and has an adult theme without all the kawaii/chibi stuff.