I vote 20-motif. I think I’m naturally like you where I have a favorite type of (jewelry or bag) and keep buying that same type of item over and over. And I totally relate to having your heart set on something and getting fixated on it even if you’ve kept making purchases to “scratch the itch” but it never did. Buuuuut I’ve had to curtail that because I end up not giving my pieces enough wear then, since there’s too many of the same things. Buy a 20 motif that you can enjoy WITH one of your lovely pairs of earrings, rather than another that competes with them for wear time!