My list goes like this...
1. Muppet Caper: Has every thing in my opinion, my favorite joke was when Gonzo was taking picturs for money and was asking this one couple if they wanted a picture and the man said his wife was sick and Gonzo says he should have left at her home having Gonzo freak out. Actually, out of all the Muppet films I'd say this one made me laugh the most and had tons of action in it.
2. Muppets Take Manhattan: Good songs, loved seeing all the Muppets together in the finale at Piggy's/Kermit's wedding, gave me a happy feeling. I actually liked Kermit's/Piggy's relationship here and Piggy herself was better than in the other films in my opinion of course.
4. Muppets Treasure Island: I know some don't like the film but I do, Cabin Fever was one of my favorite Muppet songs and I really loved all of the Gonzo/Rizzo scenes, really love that duo. The ending was pretty cool too, all the fights and working together like that. Only thing I don't like is the kid, whos one of the main characters in this film, his voice is just bah!
5. First Muppet film: Introduced all the characters to us, liked a lot of the songs and some fun little action scenes.
6. The Muppets: The only thing I didn't like was Gonzo not being in the finale number, it was pretty good other than that.
7. Muppets From Space: I'm one of the few who enjoyed it, once again loved Gonzo/Rizzo friendship, this film shows how much they care for one another. Every one helping Gonzo, finding out what Gonzo was and the ending. Oh yah, that party was pretty funny too. Wish they just left Piggy out though, her subplot was odd and lets face it she isn't Gonzo's number 1 fan, matter of fact she hates himXD
8. Muppets Christmas Carol: Gonzo/Rizzo scenes are adorable yet funny at the same time, that made the entire film for me. Some of the songs were good too but I didn't like the darkness in this film, some scenes really freaked me out.
Over all, I do enjoy all the films and specials.