I think you're taking the name of the list/thread a little too literally Jetée
I've watched
Requiem for a Dream probably five times at this point, and
Irréversible three times, but they make me feel like crap - in a good way - every time I watch them. I expect many other people would watch them once and say "that was an amazing experience, but I never want to go through that again." (This attitude is not restricted to movies either - it can be applied to real life events too.) For you and I, the list is probably more accurately described as "24 great films so painful that you need a longer break than normal between viewings" or something along those lines. I hope that helps