I have to say that the best would be the 1st Star Wars Trilogy. I'm not talking about Episodes I-III. I'm talking about A New Hope, The Empire Strikes Back, and Return of the Jedi.
But you also have to look at the other trilogies that were awesome. For example, Lord of The Rings. Right?
My list of awesome Trilogies would be...
1. Star Wars (Eps IV, V, and VI)
3. Back to the Future (Yes, I have come to appreciate part 3 since it ties everything up)
4. Toy Story
5. The Jersey Trilogy (Clerks, Mallrats, Chasing Amy :) )
Special Mention: THE MIGHTY DUCKS!
What could've been EXCELLENT TRILOGIES...
1. Spider-Man (3!!! Why did you suck??? :( )
2. X-MEN (RATNER!!! YOU RUINED IT!!!)
3. Teenage Mutant Ninja Turtles (The whole travel in time thing didn't work for me)
4. Austin Powers (Goldmember!? Really!?)
5. The Mummy (Why didn't you retain Rachel Weisz!?!?)
What should have stayed as a single movie...
1. The Matrix (You know what I mean)
What should be completed as a Trilogy
2. Bill and Ted
3. Harold and Kumar
What about you? What are your thoughts? :)