I enjoy listening to mostly instrumental soundtracks too, I’ll share a few I particularly like. For me the melodies are very important and something that seems to speak directly to my emotions like this piece:
Then you have tracks that help me feel at ease and relaxed, like these:
And other tracks just make me feel more hyped up for whatever I’m doing:
Some tracks seem to stimulate my imagination and leave me with a sense of wonder:
I imagine this music must be boring to some but I can listen to it for a long time 
There’s some OSTs from anime that I like a lot too, and naturally the tracks from Key VNs are very high up on the list as well. For me they have additional value in the sense that they make me feel whatever I was feeling when I was reading the VNs, and considering how special these are to me the music naturally is very important too. I won’t go too far into detail about Key music because there’s other topics for that.
I also listen to more mainstream music of course but I generally don’t really seek it out, so I’m more of an instrumental music kind of person I suppose.
