EndIessRAlN
Super Freak
My belief has always been that Christopher Eccelston's committment to the job didn't mesh with the show's more relaxed working environment.
If you've ever seen the behind the scenes stuff for Doctor Who, it seems like a very chill place, with everyone being close friends with one another both at and outside of work. While this does create a very friendly atmosphere to come to every day, the unfortunate side effect is that there is no doubt some time wasted hanging out on set.
Eccelston has always struck me as a very professional actor, one who likes to give his all to a role and focus on the job at hand. That, combined with a natural slight awkwardness around people made him an outsider among the cast & crew. He probably felt that everyone hanging around joking with eachother while he was trying to get the job done was a waste of his time.
I can see that happening and it's very plausible. I wanna work on the DW set...