What's your opinion on them? If you like them, what kind of do you like; any certain themes or types that appeal to you most?

I myself don't understand the appeal of copy-pasted ones (I could never ask money for those at least) with just different colour schemes, but I'm interested in the idea of unique designs. Sometimes I just want a character but I don't know what it should look like, and on the other hand seeing a character makes me think up a backstory for it, if it doesn't already have one.

I'm asking this in because I'd like to design a batch of adobtable characters or species but first I want to know if there's any interest towards them.