Film vs Music

I just saw Shrek 3 yesterday, and I thought it was a pretty good movie. Movie critics weren't too kind to the movie. That won't in anyway affect its box office performance which will be through the roof I'm sure. The movies that are usually trashed are the ones that top the box office. What does that mean? Movie critics influence over moviegoers is pretty much nonexistant.

Whereas with music critics, we tend to value their opinion more. Or we consider our friends judgement of a cd we're curious about. I think that's a pretty interesting observation.