You love the head canon where misaki has secret artistic talents so what if other HOMRA members had secret artistic talents what would they be?
Obviously Totsuka would probably be the one with the biggest variety of artistic talents, most of which aren’t very secret because everyone knows about all his hobbies. I think his best talents would probably lie with film and music, since we know he has his guitar and he’s always filming with the camera. I can imagine Totsuka as not being great at something like painting but even then he’s got a lot of enthusiasm and will just happily toss paint at a canvas and have a great time. Somehow I can imagine Kusanagi being good at painting or even something like calligraphy, just imagine him doing fancy signage for outside the bar and everyone assumes he just hired someone (oh, wait, even more amusing; imagine Mikoto with the amazing calligraphy talents. And now imagine Munakata finding out about it. You’re welcome). Kamamoto, say he’s got a secret talent involving sewing and makes all his own clothes because if you had a drastic weight loss for a few months every year you’d probably get tired of buying new clothes all the time too. Also imagine he’s skilled enough that some of his clothes can be worn in both summer and winter, like he just has to add a couple stitches in a certain spot to take the clothes in and then remove the stitches to take the garment back out and he can wear it in the winter. Anna I could see having sewing talents too, imagine her making her own little stuffed animals and such – I like the idea of Kamamoto or Totsuka teaching her but I also kinda like imagining that she already knew how, like because she’s not like other kids she was lonely a lot and so when Honami took Anna in she decided to teach her how to sew stuffed animals as a kind of therapy, like at least Anna can have her cute stuffed things to keep her company and make her feel a little less alone.