You ever have a game where you were completely ambivalent to the music, maybe you even actively disliked it...but there was one song (maybe two) that just caught your attention and you really enjoyed it?
For me it's Mass Effect. If the entire game, hell the entire trilogy, went without a soundtrack I probably wouldn't even notice or care. However...
I love this song. Sometimes I would just sit around in the Wards and listen to it. It's one of the most serene, eerie, evocative video game tracks I've ever heard.