The 100 Greatest Movie Characters by Emipre

Here's the top 20 :

1. Tyler Durden (Fight Club)
2. Darth Vader (Star Wars epidode 3,4,5,6)
3. The Joker (The Dark Knight)
4. Han Solo (Star Wars episode 4,5,6)
5. Dr. Hannibal Lecter (Silence of the lambs)
6. Indiana Jones (Raiders Of The Lost Ark)
7. The Dude (Joyluck Club)
8. Cpt. Jack Sparrow (Pirates Of The Caribbean 1-3)
9. Ellen Ripley (Alien)
10. Vito Corleone (The Godfather)

11. James Bond (Goldfinger)

12. John McClane (Die Hard 1-4)

13. Gollum (The Lord of the Rings: The Two Towers, The Return of the King)

14. The Terminator (The Terminator)

15. Ferris Bueller (Ferris Bueller's Day Off)

16. Neo (The Matrix)

17. Hans Gruber (Die Hard)

18. Travis Bickle (Taxi Driver)

19.  Jules Winnfield (Pulp Fiction)

20. Forrest Gump (Forrest Gump)

See the full list on http://www.empireonline.com/100-greatest-movie-characters/

My Opinion:

1. Keyser Sose (The Ussual Suspect), Freddy Krueger (Nightmare on Elm Street) and Norman Bates (Psycho) should be on top 20

2. R2D2, C3P0 (Star Wars), Sadako (Ringu), Dae-Su Oh (Oldboy), Michael Myers (Halloween), Pikachu (Pokemon), Chucky (Child's Play) and Spock (Star Trek) should be on the list (top 100)