Have a list.
popular: Azumanga, Haruhi
geek: NHK, Genshiken
relaxing, cute: Bottle Fairy, Kokoro Toshokan
comedy: Photon, Dragon Half, Excel Saga, Sexy Commando
romance(?): Honey & Clover, Lovely Complex, Emma
Quality: Mushishi, Kino no Tabi, Yokohama Kaidashi Kikou, Kamichu, any Ghibli film