They're not necessarily the best films of all time, but if I had to choose 5 desert island DVDs - those that I could watch endlessly and never-ever tire of, that would get me through whether I was happy or sad, they would be (in no particular order...
...Brokeback Mountain
...Saturday Night Fever
...Monty Python's The Life of Brian (or The Holy Grail, I'm not fussy - after all, HG does contain the best insult of all time: spoken in a comedy French accent "You're mother was a hamster, and your father smelled of elderberries!"
OMG, LMFAO every time. Heehee...)
...The Bridges of Madison County
...The Shawshank Redemption