"Sometimes I wind up coming out with new scenes entirely inspired by the tracks that otherwise wouldn't have existed!" --> OMG SAME!!! Lololol I feel like our processes feel incredibly similar!! This just made me smile so much!
And hahaha oh gosh I had a rather similar type of journey, starting out with sites like incompetech for my first game. I actually hadn't thought to try DLsite for music! (I only used it for the first time to get some BGs for this game but never for anything else.) Once I found DOVA was when my music world really opened up though LOL Those exact type of tracks with like a kinda circus-y / spoopy Halloween vibe are my absolute fav, so I just gravitated to composers that had a bunch of stuff like that (and from there followed them to Audiostock). That's honestly so impressive though that you actually make a good deal of your own music! I couldn't even imagine doing that by itself let alone on top of all the other dev work that goes into a game! Heheh you shouldn't feel bad at still using the occasional royalty-free song even amongst your own though!! It's already so amazing what you're doing!! (Also The Graveyard Shift is next on my list to play and I'm really excited hehehe 🤭💕)