I've seen Boogiepop, Lain, Paranoia Agent, NHK, NieA_7, Haibane, BLAME!, Ergo Proxy, Koi Kaze, GITS, Mushishi, various Makoto Shinkai works, Texhnolyze, Ray The Animation, and a few others/various OVA I can't recall. Basically, I'm into more..."intelligent" anime. And I know that sounds really fucking pretentious, but I couldn't think of a better word.
Now, I've been hunting high and low for series that share similar themes (that are which is primarily philosophical to some extent, or touching onto more mature themes rather than shōnen style anime.
This isn't exactly a 'halp me find new anime' thread, as I know there are a lot of those. Rather, it's a question of have I simply watched all anime that exists for, say, people over 18?
Amazing Nuts! and Alien 9. Have some Superflat anime.
Also, anything by Makoto Shinkai.
Eve no Jikan
>>102
God no. Shinkai's stuff is great and all, but 5cm depressed me so much.
Love can only be so pure in anime form!
Cencoroll
>Have some Superflat anime
YESSS!!!
Ushiro no Shomen Dare
Ummm...Evangelion? Yeah, you better have seen this or die.
Planet Busters
Take the X Train
Don't know if >>98 was joking, but episode 7 of cream lemon (Ikenai Mako-chan) was actually rather interesting...
Nakoruru
Eve no Jikan (aka Time of Eve) looks to be good, but only two episodes so far.
As "Pale Cocoon" & "Mizu no Kotoba" are also by the same writer/director, they might be worth a look too, but I haven't seen them yet.
BTW, why the weird fucking Captcha like "lube"?
Les Miserables
Hm... Cat Soup was really weird, I recommend it to you if you're interested in watching something different; Mononoke is quite good (not Princess Mononoke, just Mononoke. Tough the Miyazaki movie was pretty awesome too); Monster; End of Evangelion (a mindfuck, in its own way); most things by studio 4C, I guess; and I really really want to reccommend Beck since, even tough it is not that deep, it portraits youth quite well and has great character developments.
I was really disappointed with the second half <_< I actually wish they had skipped directly onto episode 26 (which is, by the way, my fav episode of the entire series :D). To the person who has started this topic: this isn't all that special, but it's a nice thing to watch. I really enjoyed it (except for episodes 15-26).
I second Kanashimi no Belladonna!!!!