Welp, ofc personalities matter more than looks in a relationship. I have met many pretty people with nasty attitudes and never associated myself with them. Even if you start dating someone because of their looks but you two are not compatible, it won't last long anyways.
Looks are not super relevant but they still matter to me aka I don't strictly want to date a supermodel but someone I can be physically attracted to at least, regardless of how "conventionally attractive" they may be to society.