For me...
Monster, Ergo Proxy, NHK ni Youkoso!, S.E Lain, Paranoia Agent, Mindgame, Shigurui, Sayonara Zetsubou Sensei, Mononoke[kusuriuri], almost everything by Studio Ghibli, anything by Studio 4ÂșC ...
For great adventure anime: Seirei no moribito (26eps) and Sword of the stranger (film) are just my favourite ones. Assuming that everyone has read-saw-got Rurounin Kenshin.
Mind->-bleeped-<-s are my cup of tea, definitely. Good storyboard, nice animation, experimental things, nice sound.... for me, an anime has to be something more than just a bunch of high school girls with boobs and stupid faces making a rock band....
Oh and a very, very important thing in just three letter: V.O.S. I won't see anything dubbed. If it's made in japan, I want to hear japanese, if it's made in korea, I want to hear korean.... gawd I can't stand dubbs, and are getting worse each day. Subs for the win!