I would say the internet. It's been detrimental in some ways but probably beneficial in more ways than it's been detrimental.
I don't know if most would consider it a hobby but listening to music with soothing melodies on headphones really takes the edge off of life for me. Mostly I don't even need music with words because I can't think of a single song that I started listening to because of the lyrics. It's all about the melody (and sometimes the cadence and the flow). It took me so many years to realize most of the songs that are stuck in my brain have lyrics that are totally irrelevant to me and my brain has always just heard the music.