Most Fun Movies

What are some movies you consider to be the most fun? These aren't necessarily the best movies or the most well-acted or the ones with the best storylines but the ones that are just plain old entertaining and a great movie-going experience.

They usually have a pretty basic premise and hit just the right combination of action/adventure, climactic moments and laughs. These movies are usually of the "summer blockbuster" variety.

Here's some of mine:

Pirates of the Caribbean
National Treasure
The Mummy
Indiana Jones Trilogy
Iron Man
Speed