So, while a 3-hour movie might be impressive if it has a truly worthy story to fill the time, usually it just means someone couldn't check themselves and cut down on their own self-serving content. The Lord of the Rings
was really long, but it still had to cut out a lot of the content from it's source material. King Kong was also really long... and it could have lost about an hour and a half of the film. Which would have distinctly improved it. Some films – I’m looking at you, Transformers 2 – are clearly just made for the flashy effects, and those should be even shorter, lacking that they are in a fulfilling storyline with real characters.

