There are so many to choose from it isn't even funny
but lately i've been listening to broadway musical OST's so i can't just pick one
outside of musicals though i've been listening to That's All by Skitz Kraven or literally any Alec Benjamin song.
7empest by Tool at the moment. I don't really believe in a lifetime favourite for me as I listen to so much music, it's ever changing. But this song is a very long journey that takes it's time to build which is my style.