The Adventures of Robin Hood (1938)
A wonderful spectacle that includes most of my favorite Robin Hood stories in a single film. And what Errol Flynn lacks in Douglas Fairbanks' sheer acrobatic ability, he makes up in swordsmanship and charm. It's tough for me to pick a favorite between the two of them.
Meanwhile, Claude Rains is a memorable Prince John and Basil Rathbone is always a delicious foil for Flynn. I'm not a huge fan of Olivia de Havilland as Marian - not when I have Mary Elizabeth Mastrantonio to compare her to - but she's fine and I have no complaints either.
Robin Hood (1973)
Made during a time when Disney was creating animated features on the cheap, but it's no less charming for that. It's not the best Robin Hood, but it will always be my Robin Hood.