~SFW~
5 Centimeters per Second: scenery porn
Blue Drop: yuri shoujo
Cowboy Bebop: music, characters, setting, ...
DAICON III & IV openings: motivational
Fate/Zero, Ghost in the Shell: action, art, music, philosophy, ...
Hikaru no Go: sports anime
Kamichu!, Mushishi: supernatural
K-ON!, The Melancholy of Suzumiya Haruhi: slice of life, comedy
Mahou Shoujo Madoka Magica: art, music, magical girls
Mononoke Hime, Nausicaä etc.: Ghibli
Oh! My Goddess: romance
Patlabor: mecha
Please Save My Earth: tragedy
Sakurasou no Pet na Kanojo: slice of life, romance
Shinsekai Yori: sci-fi
Sword Art Online: virtual game worlds
The Vision Of Escaflowne: action + shoujo
Tonari no Kaibutsu-kun: shoujo, romance
Zetsuen no Tempest: shounen, philosophy
~NSFW~
B Gata H Kei: comedy, romance
Bakemonogatari & sequels: SHAFT
Choujin Densetsu Urotsukidouji: supernatural, gore
Golden Boy: fan service
Hentai Ouji to Warawanai Neko: slice of life comedy
High School D×D: plot +
PLOT
Kiss x Sis: comedy
Neon Genesis Evangelion: psychology
Panty & Stocking with Garterbelt: Powerpuff Women
Tasogare Otome x Amnesia: supernatural