This isn't necessarily your favourite film - it certainly isn't in my case - but what's the one film you can watch time over time, and never tire of? Not that this means you can chain-watch it, every day of the week, but the one that you turn to when you're feeling down. The one film you know is going to give you that warm feeling inside... your 'comfort film'. Feel free to include a clip of (one of) your favourite scene(s). I'll kick off and say that mine is National Lampoon's Vacation. We have a film channel here in the UK called TCM (which I think is an American film channel) that show this film on a regular basis, and if I make the mistake of switching it on, I absolutely have to, without question, watch it till the end. It may be in the early hours of the morning when my body is screaming for bed, but no, I have to watch it out. But to analyse why this film has such an effect on me is quite difficult. Chevy Chase's performance is certainly a huge factor, but beyond that I can only imagine it appeals to my love of long car journeys. One of my favourite scenes.