Hard choice... I have to go with
Raiders of the Lost Ark. He was so scruffy, tough guy, a bit of a weasel. But a lovable weasel.
In
Temple of Doom he was still scruffy and tough, and a lovable weasel, but it didn't quite match with the way he was in
Raiders. And in
Last Crusade he wasn't scruffy anymore (because he hardly had any stubble) and there were less lovable weasel scenes.
But all of the films are awesome, and I can't wait to see KOTCS!