On but slightly off, topic. My favourite film is a French film called The Big Picture starring Romain Duris. However, a month ago when I was desperately trying to move money around, one of the many, never-ending security questions I was being asked by my bank was 'What is your favourite film?'. Obviously I had set this question ages ago, but could I think of it?? No! Nearly drove me around the bend. Changed my security questions later, but whenever the subject of favourite film comes up, I react with abject horror!
PS My other favourite films are like many of you have mentioned - Goodnight Uncle Tom, Brief Encounter, The Railway Children.