Preferences are a curious thing. I pay attention to how many likes and comments my characters get, and I find it difficult to predict how popular they'll be. Sometimes I create a character who I think is relatively mundane and she'll get a dozen faves in a day, and other times I'll work really hard on a cool, original design and I mostly just get crickets chirping.
I can see something similar when I commission people. I buy a lot of commissions, and when communicating with the artist I often link them to my gallery of reference sheets so that they can choose which character they'd like to draw for themselves. I do this because it usually doesn't matter very much to me - they're all my babies, and I delight in seeing any of them drawn - and also because I want the artist to have fun and freedom by drawing what they want. But I've noticed a definite preference in which characters are chosen. This results in some characters being drawn a dozen times, and others who have never been drawn at all.
Of course there are exceptions, but generally speaking, it seems that the weirder the character is, the less keen on it people seem to be. It's beginning to look like I'd be a lot more popular if all I drew were generic anime catgirls! Well I'm not going to do that in any case, and it's not like I'm really disappointed or discouraged. It's just something I've noticed.
Weird monster girls forever!