hmmm..., I have seen so many anime at this point, and I am bound to miss some in my list. Here goes though:
1. Legend of the Galactic Heroes
2. Code Geass
3. Clannad
4. Fairy Tail
5. Hunter x Hunter
6. Fate/Zero
7. Death Note
8. Fullmetal Alchemist Brotherhood
9. Angel Beats
10. Fate/Stay Night: Unlimited Blade Works