I've thankfully not had many issues with my feather-footed breeds despite that our spring is usually sloppy muddy, but I could definitely understand why that would deter someone from keeping those breeds!
I did forget, though, the other major deal breaker trait for me is hybrids and strains of...
I have kept so, so many breeds over the years for so many different reasons!
Some were just what was available at the time (red sexlinks, an amberlink, Gold-laced Wyandottes, a Black Australorp)
Some were gifts or rescues (Gold and Silver Sebrights, Speckled Sussex, Partridge Plymouth Rocks, a...