Breeder? Absolutely not. As Laur said, some breeders be crazy and in most cases, you will deal with them in the long-term for the dog's life at least to a certain extent especially if you need anything/there are problems. I WANT that breeder support and I want it from someone who isn't nuts.
I also don't purchase from breeders, regardless of what they are producing/if I like the dogs, if they do things I don't like even if those things aren't necessarily bad...I wouldn't purchase from a breeder who houses dogs in outdoor kennels for example, just not my style.
So it isn't about GOOD VS. BAD to me just... not like vs. like. No breeder is perfect, although Merlin's to ME is incredibly close.
Not only do the breeders I work with have to be responsible and fill all my criteria, they have to be NICE and communicative and available. So yea, high standards lol
Rescue? Probably not but exceptions
The only exception is... I am less strict on rescues than I am with breeders. I don't expect a relationship for the lifetime of the dog, support etc..etc..
so the line for "rescue I don't like" is really just
A) overly protective when it comes to adoption procedures (I think ONE home check is more than sufficient)
B) Hoarder type situations in foster homes which goes hand in hand with dishonesty on dogs true temperaments
exception being, the line is less black/white of don't like and if I truly LOVED the dog, I would just deal with it.