I'm currently designing a board from actual traces of my finger movements on paper (I was mildly amused when I found that they are not symmetrical, like all human features) in combination with these: https://fkcaps.com/keycaps/hex. It's also my first attempt at using a MCU directly (kinda, MDB50Q).

Probably not possible to make a product from my anthropometrics, but I could try average out a few hands.