(admin: merged from another thread) 

Hey, 

I have wanted to mention 
-- The Star Wars Trilogy 
-- The Godfather Trilogy 
-- Back to the Future Trilogy 
-- The Matrix Trilogy (no takers?!) 

But, you people have mentioned most of them. 
;)

Anyway, I voted for Lord of the Rings ... due to recency effect and maybe because it looks more continuous and consistent than the other three ... ha ha ha ... you know why? because they are filmed at the same time ... ha ha ha ... actually another selling point is: both critics and movie goers like it!!! 

Anyway, I think the votes will be primarily split between Lord of the Rings and Star Wars ... dep on whether you are a special effects person or a classic person ... ha ha ha ... 

-- I am less for Godfather because the 3rd was a let down ... 
-- I am also less for the Colours Trilogy because it is too artsy for some 
-- I am also less for The Matrix because 1 is excellent, but 2 is ok (dragged down by the 1st hour of the film) ... and 3 is ... (oh no, I can't recall clearly what happens in 3 ...) 

I also want to mention 
-- The Infernal Affairs Trilogy (though only 1 is excellent, 2 is good, 3 is really *no comments*)