That being said, here's my list:
1) Kanon '06
2) Aa! Megami-sama TV
3) Ef - a Tale of Melodies/Ef - a Tale of Memories (The 2 together make 1 long, brilliant Anime)
4) Higurashi no Naku Koro ni
5) Azumanga Daiou
...Of course, running a very close 6) is the entire Aria series, 7) Kamichu, 8) Ai Yori Aoshi/Enishi, 9) Clannad and 10) Lamune or Chobits (I go back and forth on these two).
Even ten is really limiting; I mean I could go on with 11)...{it's time to take my medicne now muhahaha}
