It happens, but I usually don't listen a soundtrack for a game that I plan to play before beating it at least once.
Anyway, I like to watch/listen the "The Music of Video Games" playlists on YouTube, there are many game that I will never play that have a good soundtrack.
To tell you the truth, it's easier for me to listen a remix from a game that I have never heard about than its original soundtrack...
Another thing: I think that if a game has a lot of remixes (or an entire project) dedicated to it, is surely a game that deserves attention, at least for its soundtrack .