The movies were good except for two things:
1. The Thing - while the thing is very close to the original thing in the beginning of FF, he should be larger and more powerful to reflect how he was portrayed in much of the series. This is a guy who went toe to toe against the Hulk on numerous occasions. - The Hulk in the movies (and many of the comics) is WAY too powerful. The Thing needs to be bumped up a couple notches and the Hulk needs to be bumped down a few. (The Hulk will still be more Powerful).
2. Doctor Doom - they changed him and his story too much. He was made into a punk.