Personally I would think that 'Polar Express' would be one of Hank's best films because of how it was made and how many characters he played.
But from the poll I would have to either pick 'Saving Private Ryan' or 'The terminal'. 'SPR' I liked mainly for the other actors in it and the fact that the story was based around true events. Hanks does play an emotional character too; so it helps to set the scene more. And the 'terminal' was just funny!