Sorta jumped the gun and answered Courtney, but I'll also answer Action Batch:
I play keyboard. Poorly. And guitar. Poorly. Heh, anyway, onto the movie question:
I could probably give a couple answers to that, so I will.
My favorite movie from my childhood, and one of my first vivid theater experiences, is Raiders of the Lost Ark. Now, I was kind of a giant wuss as a kid, and so it would seem that a movie where, at the end, a bunch of ghosts fly around and make Nazis (and a Frenchman) either blow up, deflate, or melt, would have given me nightmares. For reasons I cannot possibly begin to fathom, that never was the case. I loved that part, and was always completely fascinated with the special effects in that scene. I would watch that movie over and over again once we got a VCR. The fact that the rest of the movie is a pretty darn rollicking adventure helps too.
Some of my favorite movies that I've discovered in more recent years are:
Casablanca
Shaun of the Dead
A Bug's Life
That's probably good for now.
It's summer, so I'm gonna make this summer related: What's your favorite Beach Boys song?