lain, Evangelion (especially the ending. the movie one.)FLCL, Wolf's Rain (paticularly episode 30 *cries*) but not much else. after these, i've become verry unscarable. WOOTZ!!! i created meh another word! i have yet to read the entire Angel Sanctuary series. right now i only have vol. 1, cuz i'm poor. but i heard it's pretty messed up. messed up is good.
and although it's not anime, all of Jhonen Vasquez's comics and Invader Zim scared me in some weird sort of satisfying way. fun stuff!