I already have a lot of hobbies. So much so that at any given time there's just a "core" set of hobbies I can indulge in and my various hobbies flit in and out

I already have a lot of hobbies. So much so that at any given time there's just a "core" set of hobbies I can indulge in and my various hobbies flit in and out of this set depending on the circumstances. For this year, I want to go for depth rather than breadth. For instance: - I can already play the guitar reasonably well so how about going into music theory next? - I can draw well but I've been mostly drawing portraits and human figures. So how about still lifes and sceneries? Or draw with color as so far all I've been doing is elaborate sketching. - Maybe finally learn Copperplate. - After doing Taekwondo since 2004, I recently just picked up boxing and kickboxing. Definitely a lot to learn here still, and even more to integrate from TKD! I wanna get good form on my head movement, get that explosive technique on my punches, throw all my body weight into my hooks, etc. On to another decade of curiosity, I guess. :)