Hmmm...Here is my breakdown:
FF (1994) - The movie is low budget and sucks in all ways. But, I think the movie had a good outline and overall story platform. Had we had decent dialogue, acting, and effects, the movie would have done a good job at doing Doom's origin and the FF's origin in the same movie (a feet people seem to think is perilous on here).
3/10 - If only money and talent was put into this
FF (2005) - This movie has good effects (minus some of Reed's effects), gets the family aspect of the FF mostly right, and effectively makes Ben the main character, and does a good to decent job with the FF members. However, Doom just sucks as a villain in this. Doesn't even deserve the name. He is never really a threat, and goes after the FF way to late into the movie. I mean, we get only one real fight. Could have done more.
6/10 - Passable, but easily could have been better
FF: ROTSS
Good job with 3 of the main FF members (though Johnny's complaints pale in comparison to Ben's from the first), but Ben fades away and does little in this movie. Doom is somewhat improved, but still lacking. I mean, he puts on a metal suit FOR NO REASON and is way to easily beaten by Super Skrull Johnny (lame fight
) The SS looks cool and I feel was done fairly well, but leaving Galactus and the ending vague hurts the movie and the concept of the Surfer (shouldn't need a spin-off to fix an ending). Also, Reed's effects still suck, but they are otherwise very good.
6.5/10 Better, but still, not great.
I guess ROTSS is the best, but there is lots of room for improvement in this series. Especially concerning the area of villains.