I loved "The Red Balloon" as a kid but never watched as an adult. Should rectify that, bet it's on Youtube.
"The Magnificent Ambersons" bored me to tears and I love "Kane" (though "Touch of Evil" is my favorite Welles.
Watch The Marx Bros blazed brahski. I assume you watched "Duck Soup"? Agree with the general consensus that it's their best but "Horsefeathers", "Animals Crackers" and "Monkey Business" are all great too.
I couldn't get through "Satyricon". Maybe if I'd watched it when I still smoked weed. But probably not. Norville loves it, of course.
The only Critereon extras I've watched are a documentary short that actually follows Hunter S. Thompson and Ralph Steadman around Vegas. Thompson gets paranoid and self-conscious and hides from the camera. Good times.