I don't know if my opinion is unpopular, but I don't like most of the designs of the female characters. I get that Mihoyo has a certain design philosophy and while it's not offensive or anything, it also doesn't stand out to me. Too often, it's either bare legs no matter what, a super-tight bodysuit or a thin layer of paint instead of proper pants. Some have hairstyles that... make me unreasonably irritated. I feel like Mihoyo creates amazing and sometimes quite intricate designs when viewed from behind, but the front part often looks like it's been cut in half for the sake of fanservice.
I'm just... disappointed, I think. I want to like them, I really do.