I like Castaway and You've Got Mail the best. Gump is too simplistic and boring. I don't need to see that one again. Philadelphia was excellent, but I don't need to see that one again. Castaway, except for the ending, is very watchable. I kind of like the shipwreck genre anyway...Robinson Crusoe, Defoe, LOST..etc.
You've Got Mail is just funny. Great cast. Parker Posey pwns her role. Dabney Coleman was one of the most underrated comedic actors.