FUCK...
Back on topic...
I have watched several old animes before. Around the 90s and early 2000s.
I dislike naruto/bleach and all those typical animes you see on cartoon network late at night. (label it adult swim if you want, its still called cartoon network)
One of my favorite ones is either fushigi yuugi or ayashi no ceres. I watched it when I was about 11 or younger and it had rape, murder etc, it did not hold back showing it (also how I learned what sex is) and I always felt scared.
Great Teacher Onizuka is also one of my favs.
When I was very little, I was a huge fan of ranma 1/2.
Boys be was also my favorite, for it did not have the sci-fi fantasy animes usually have. It was an anime about guys and how they view life. Etc.
There are several more animes that I can't think of at the moment, but the recent one I've seen other than High school of the dead is;
School Days.