I put down all of the hobbies I do regularly, and I put them in groups. So, I put one experience as "Textile Arts" and included knitting, crocheting, sewing, pattern drafting, teaching friends to spin, etc. under that. For another I put "Theatre" and included acting, musical theatre, stage combat, technical lighting, set building, stage managing, etc. I didn't inlcude things like writing poetry, which I did steadily for a year or so, because it wasn't a serious hobby, even though I still do it occasionally.
I would say put down everything you do seriously, but don't split things up too much.