a lot of it comes from "no one's going to draw my vision so i have to do it myself" hahaha which is why drawing song parodies excites me the most. other things that inspire is the emotions i want to evoke in ppl that look at my drawings (whether it's angst or softness) and wanting to improve

as for more tangible inspirations it's the source work of my art and most definitely vocasynth community songs/MVs. even if it's not a parody there will almost always be an inspired vibe in the drawing