this is a nice question... i'm answering it much later than it was asked because i wasn't really feeling like it before

sheldon would primarily enjoy electronic and experimental music, but he also wouldn't be opposed to some types of rock or just classic music... the only thing he'd likely find too boring and grating would be pop music (which is also true for me)

considering he's autistic like me, he'd absolutely love listening to actual breakcore... like, not the popularized hardcore version of breakcore (ex. goreshit) but real niche experimental breakcore (ex. venetian snares)

tho he definitely would also love something mostly stimulating and dancey like anything related to hardcore: gabber, speedcore, mashcore, j-core, happy hardcore and just rave music

anything industrial-themed but especially nine inch nails would be perfect for him with all of its emotionally intense (bpd-related) themes and complex sound textures but he's not the type to listen to nin like some tend to play the downward spiral every single day lol... he'd only listen to nin at very specific moments in his life because the music hits too hard

sheldon would also quite like styles of rock that are more lethargically emotional and lovesong-y (like radiohead) or psychedellic and "stoner-y" (like king gizzard and the lizard wizard)

he'd also probably like overstimulating himself with something much noisier (ex. harsh noise) when he feels like dissociating through music

...so yeah, describing sheldon's music taste is pretty much the same as describing my own because music is way too personal for me to not see a character i associate with the most as basically the same lol... but i also imagine sheldon as someone who'd definitely make his own music, specifically experimental electronica akin to ambient, glitch or aaron "vsnares" funk's breakcore