My favorite anime series would be:
1. Shakugan no Shana/Shakugan no Shana II.
2. Suzumiya Haruhi no Yuutsu.
3. Fate/Stay Night.
4. Magical Girl Lyrical Nanoha/A's/StrikerS.
5. Lucky Star.
6. Azumanga Daioh.
7. Death Note.
8. Strawberry Panic.
9. Shuffle!
10. No series worthy yet...