That's a darn good list, BMF. I do think that Big Lebowski is overrated, though, and I'd add Goodfellas, Star Wars, Lord of the Rings, and Caddyshack.
Good one's as well as Vacation (hell, Christmas Vacation was just as good as the first). I'm not a big sci-fi guy, so I didn't mention Star Wars (which I loved as a kid) or the Rings/Harry Potter type movies. Also not a fan of the comic book movies.
Another one that I love is Office Space. Add Uncle Buck, Old School, Super Bad, Trading Places, The Jerk, and a bunch of under-rated comedies.
I'll vouch for you on that... my brother made me watch it... and listen to Sinatra for the first time... glad he did on both counts.I almost forgot another of my all time favorites...the Usual Suspects. And for comedies, an underrated classic is Midnight Run with Charles Grodin and Robert DeNiro. A lot of people have never heard of it. If you haven't seen it and you like dry humor, it's worth a view.
Trying to steal my thunder...
LOL. Well, at least you know I'm not Casey.
My bad. Geez.
Casablanca is my all-time fav