1. "Flash Gordon" (1980)
Max von Sydow's iconic performance as Ming and the truly awesome score by Queen make this movie quite watchable.
2. "Battle Beyond the Stars" (1980)
George Peppard as a space cowboy and Robert Vaughn as a seriously dark loner. Plus some really creative ship designs and aliens.
Oh, and John Saxon ALWAYS plays a compelling villain.
3. "Magical Mystery Tour" (1967)
This is a must-see movie for any hardcore Beatles fan and I really do emphasize "hardcore" here.

The plot makes zero sense but the music is great.