holy crap. i don't think there are any songs i can play on an instrument any more. once upon a time, i could play lots of pretty things on a piano, but i haven't touched a piano in YEARS. decades since i played in earnest and practiced.
when i did play, my favorite things to play were bach preludes. like this one
or his minuets, like this one
or airs, like this one
just loved playing bach. i won a bach competition when i was seven or eight years old, and i was completely hooked after that. <3