^ Well, they did have two Al Gore ones (which, I have to admit, were really funny).
The first movie was terrible. For an animated show was such a strong continuity, I was shocked at the retcons and Neros they made with it. Plus, it dragged down the story making it needlessly confusing.
The second, I think, is the best of the bunch. Very clever and funny. David Cross as Yivo was great.
The third was enjoyable, but the whole D&D stuff failed. Mostly because it just felt like the writers said "Crap...we still need another half hour. Um...lets to this!" It just felt out of place and didn't amount to really anything (save for the reveal of the connection between two characters).
The fourth was very meh. It wasn't bad, but it wasn't that good. It was just sort of there. For what could be the final adventure for this crew and how the producers were really going on about how epic the movie was going to be, it felt really flat.
Overall, the Futurama movies were let downs, which was really disappointing for me as I am a big-big Futurama fan.