Not sure if anyone here has the right to say that considering movies like Matrix and Dark Knight were heavy favorites. Movies with GAPING flaws but squeezed in because of fanboy appreciation.
Gump is a bonadife classic. No beef with someone having it in their top 10.
I'd say the matrix earns it's spot based on impact and being a landmark film tho. Flaws and all. No movie on the list is perfect they all could stand another edit or another pass on the script. MAYBE citizen Kane is prefect but that's a strong maybe.