i have experience with both, but definitely drawing for me. i love drawing, but progress is slow and i would love to get better faster. being able to just put what's in my head onto paper is a feeling of elation unlike anything else, when i actually can achieve it, that is.
music is great too, but for me personally i feel like it's easier to make progress in that. much less complicated and easier for me to wrap my brain around just through practice.