Making the poll require users to be in the Artists group just to vote is a major downside on your part because a lot of artists are not part of the group. You’re missing out on potential votes.
Anyway, I use the blocky characters because the rig is iconic and easy to use. Anyone would know that “Hey that’s Roblox” when they see it (mostly for marketing purposes).
I prefer blocky characters to work with and I use blocky character for most of my commissions. I can do man/women characters but it mainly depends if I have the rig for it. I do use rigs for my gfx though.