JT,
I've been doing the same thing with my son (my daughter's attention span only allows her to cope with 10 min Youtube clips
). He loved Back to the Future as well. Wayne's World was another that scored highly.
Lowlight so far has been Bill and Ted's excellent adventure. I can't believe I remembered the film as funny. Maybe its because this time I wasn't high while watching it.
We also watched the Big Lebowski. He's 14 so I figured that's a good time to introduce him to the Dude. I was nervous he wouldn't get it, but when he cracked up at "Obviously you're not a golfer", I knew he would love it
.