My experience has been the following.
The worst women are those that own pugs, Boston Bulldogs, and other small breeds they try to shove down your throat as hot.
Narcissists, Karens, and deranged AF. Not always true but true most of the times. These women buy these small animals and then try to parade them around as sexy. No b1tch, I don't care what you say, that Pug is not as handsome as a German Shepherd. These are your prototypical Youtubers and Instagram clout chasers. Truly awful. So many personality disorders I have seen.
Shelter and rescue fanatics are always deranged.
Any woman that is shoving people to adopt don't shop is crazy and trying to cover up for her personality flaws. You can assume that she is a hardcore left wing activist of some time and almost always deranged. I find these women also become Thought Police and try to control all aspects of your life. It's okay to get a dog from a pound or a rescue but never ever date a woman or make friends with a fanatic that thinks people who get dogs from breeders are literally Satan. These people are always deranged.
As for Pitbull owners, it kind of depends on her ethnicity.
White, Asian, Middle Eastern, or any the more ethnic races owning pitbulls are crazy women. These women are the types that will date a thuggish black dude only so they can say they are not racist. Always trashy as well.
However, some Latinas and a lot of black women who own Pitbulls tend to be a lot more sane. I find that black and Latin women in general are less preachy about dogs and dog ownership.
You should marry a girl that owns and takes care of a big but not dangerous dog breed.
Newfoundlands, Great Danes, Golden Retrievers, Huskies, etc.
I find that women who own these difficult to own breeds but do so successfully make for great wife and LTR material. These women know what responsibility is and can handle a lot of it. If you see a girl with her Golden, her Lab, her Husky, or her Newfoundland that she is taking care of, guarantee that she is a cool girl worth a relationship.
Every girl I know that owned a Husky and did so successfully has ended up being excellent LTR material. They know of accountability and responsibility because the breed is so tough to own.