I know lots of people are gonna tell me that I'm playing guitar for the wrong reasons, and that I'm missing the point of playing an instrument. I just enjoy physical aspect of playing the guitar more than the actual music I'm playing. There's something about not being to play something difficult at all to finally being able to play it cleanly. It's what keeps me going. It reminds of back when I played World of Warcraft. You grind for ages even when it's kind of boring, but then the feeling of finally leveling up brings me joy. I like it when my fingers feel so loose and flexible on the fretboard. The fact that it sounds nice while playing is just a bonus.
I know there's also joy in creating new music. But I never really felt interested in that aspect.