Your favourite music movie?

For music that fits the story, I have always liked the film Mercury Rising.

For fun, Josie and the Pussycats...a child's film made in the tradition of Rocky and Bullwinkle--for adults who pay attention.

For bombast, Star Wars IV (first one in 1977).

Wow, someone mentioned my late friend and composer Aminadav Aloni for Once soundtrack he composed in 1973.  He was a leader among composers of Jewish choral music in the second half of the 20th century.  This was an unusual film experience for him.

Don Juan DeMarco -  a wonderful little film with Dep, Brando and Dunaway.  The opening track is "Have You Ever Really Loved a Woman" receiving a Grammy nomination for best song but don't be fooled,  The infectious score was composed, orchestrated, and conducted by Michael Kamen and was performed by the London Metropolitan Orchestra.  This is great red book mastered by Bob Ludwig of nearby Gateway Mastering Studios.  Top shelf stuff that makes a great gift!

Paris, Texas - A dark, interesting movie with Ry Cooder keeping it all moving.  

aforementioned, Cal - Mark Knopfler, nuff said.

Gladiator - No surprise, but a subwoofer tester and mood gratification.

O Brother, Where Art Thou? - Fun ride that can take you down very interesting bluegrass roads, if you chase the artists.

5 is a good stopping point.  More Peace!, Pinthrift

Don Juan DeMarco -  a wonderful little film with Dep, Brando and Dunaway. The opening track is "Have You Ever Really Loved a Woman" receiving a Grammy nomination for best song but don't be fooled, The infectious score was composed, orchestrated, and conducted by Michael Kamen and was performed by the London Metropolitan Orchestra. This is great red book mastered by Bob Ludwig of nearby Gateway Mastering Studios. Top shelf stuff that makes a great gift!

+1 .. love the movie and the score.

Little Shop of Horrors
Chicago
Grease

I know I'm missing some obvious ones I love but those three spring to mind.