In reply to The Lemming:
My fave ten in no particular order:
Python's Life of Brian and Holy Grail, Catch 22, Mash, Dr Stangelove, Blues Brothers, Clerks, Little Miss Sunshine, Some Like It Hot, Withnail.
Honourable mentions to: Dark Star, the best of the Gillian, Coen Brothers, Woody Allen, Reiner and Brookes movies and the old black and white classics from late Ealing back to Chaplin.