You heathens, how can anyone not have an Ed Wood movie on their ten best of all time list? 
Best Overall: The Seven Samuri, Only movie I have ever seen with great story, action, and characterization, I quess being 6 hours long might explain how Kurasawa was able to fit all that in.
Best epic: Braveheart, Kind of predictable, but one of the few movies that made me emotionally feel for the characters. I was ready to grab a claymore and fight for freedom.
Best Character study: Citizen Kane, after watching this movie everyone should be immediatly required to watch RKO 281 a cable movie out a few months ago that explains and complements greatly.
Best Thiller: Sixth Sence, only movie to ever shock me that much with a surprise ending.
Best Sports movie: Slapshot, One of the funniest movies still keeping a true sence of the sport.
Best Action movie/chase sequences: Ronin, the one with DeNiro that came out a few years ago, Good story, suspense and finally a car chase better than Bullit.
Best Spoof: Monty Python and the Holy Grail.
Best Romantic Comedy: Ummm does a Fish called Wanda count? that’s the only movie I can think of close to that category that I didn’t hate.
Best War movie: Apocolypse Now, The Directors cut without credits. truly immerses you in a Fu…ed up world as your sanity leaks away.
Best Sci/fi:Close call but I have to give it to Blade Runner. Runner uses the Sci-fi elements to add to an interesting story about realty, rather than ohh-ahh special effects to numb you.
Thats my ten, although Plan 9 from Outer Space is cleary the most important movie ever made.