Unfortunately we don't have polls in lemmy. Nonetheless I'd love to hear from you: What's your favourite Star Trek theme and/or your favourite scene with special (background) music?
For example: My favourite theme is TNG and my favourite scene is Cochrane's warp speed flight in First Contact with Steppenwolf's "Magic Carpet Ride".
My favorite theme is definitely Deep Space Nine!
Favorite scene is a little harder though. I'll probably have to go with the montage scene in the last DS9 episode, which had a slow instrumental medley of The Way You Look Tonight and the DS9 incidental music.
I also think the scene in DS9: The Siege of AR-558 where Bashir is playing the recording of I'll Be Seeing You is really good too. It works even better on a rewatch after you see how important the song becomes to Nog.