It depends on your definition of fun. For me, it's those films I could watch again and again and with a massive great grin on my face as I know I'm in for 2 hours of unalloyed bliss. Films like 'Where Eagles Dare', The Long Kiss Goodnight', 'Theatre of Blood', 'Kiss Kiss Bang Bang' and Star Treks 2, 3, 4 and 'Generations'.