I personally have quite a few scores to films I haven't seen, but I'm trying to see them because I always find that the score sounds 50% better once I've seen the film.

Scores have also introduced me to films I had otherwise not even heard of, such as Rocketeer (not that they're anything special as films)

In my case it's probably about 50/50.

I've got plenty of scores which are great on their own, but on seeing the film the music is recorded at a terribly low volume or not there at all. If I'd seen the film first, I probably wouldn't have bought the CD, and I'd have really lost out.

On the other hand, sometimes I see a film I really like, to which the music seems integral in many scenes, yet which make for a long haul as a listen.

In the first category I'd mention many of John Williams' scores, which nearly always are rewarding listens on disc, no matter how badly dubbed and edited in the actual movie.

In the second category I might say something like The Game. I love the film, and on screen the music gives goosebumps, but it's a real cure for insomnia on its own.

I know you hate things like this Thor, but to me its not really reliving the film that I like about listening to the score, but remembering the experience.

Instead, for me it's about the music and the various styles and intricacies therein.
I just don't want to sit and watch every movie ever made so I can hear the music.

about 85% of my scores are to movies I haven't, or have no intention of seeing.

I, too, buy on the strength of a composer's name. Newman(s), Waxman, Bernstein, Burwell, Poledouris, Williams, Goldsmith, Barry, Doyle, and Elfman are all almost automatic purchases for me.

Soundtracks that I own without watching the movie:

1. Drop Zone
2. Kalifornia (1 score track)
3. Rudy (my brother's recommendation)
4. The Cider House Rules (though I own the video, I am still yet to watch it!)

Other movies where I have watched the movie some time ago without remembering much of the score:
1. Legends of the Fall
2. Crimson Tide
3. The Long Kiss Goodnight

Sometimes I go to a video store and rent based on who composed the music... One movie I did this with was The Eiger Sanction (Williams). Great score, horrible movie.