It's really, reeeealllly hard to choose a top ten so I might add a couple extras....
1. Dragonball Z
2. Neon Genesis Evangelion
3. Parinoia Agent
4. FLCL
5. Bleach
6. Tokko
7. InuYasha
8. Ghost in the Shell: SAC (both seasons)
9. Fullmetal Alchemist
10. s-CRY-ed
11. Trinity Blood
12. Blood+
13. Crayon Shin-chan
14. Noein
15. Street Fighter II (I own the entire series)
16. Cowboy Bebop
Theres alooooot more than this.....but I somewhat narrowed it down....