I had absolutely no interest in Avatar, the look of the aliens turned me off, like blue Robert Pattinsons... So I never saw it at the cinema, and had no interest until my dad bought the blu-ray and said it was fantastic in 3D. I still wasn't keen but I watched it, and was totally converted, it was great.
I was obsessed with Star Wars as a kid - collected all the figures. Lost interest in it as I grew up, and by the time the second trilogy came along I watched the first one without much enthusiasm - and hated it. the whole Jar Jar Binks thing and the child actors, not for me.
The new one looks fantastic though.
It does seem to create a male/female divide. Yesterday in the supermarket I was buying the paper and there was a free poster kept behind the counter. The checkout lady asked me disdainfully if I wanted the poster and I said sure, and she said she has never seen a Star Wars movie and is baffled as to why anyone would like it.