To be fair, a lot of them either are trash or turn into trash.

1. Todoh

2. Kallen

3. Lelouch

4. Mao

5. C.C.

6. Rakshata

7. Diethard

8. Suzaku

9. Euphemia

10. Villetta

Everyone else has one or two flaws that seriously peeve me enough to hate them.  Except for Ohgi, he simply got outclassed by the top 10.