I just saw this old episode of BBC Horizon... (Score 1)

A wonderful (IMO) insight into the scientific process & mindset can be found in Richard Feynman's 1981 interview on Horizon called "The Pleasure of Finding Things Out" http://video.google.com/videoplay?docid=8777381378502286852

There is also a good bit of biographical stuff in the video, but the other parts are worth checking out in relation to this topic. Also, elsewhere on Google Video the same piece is cut into 10 minute chunks.