I think it's up to the individual to decide which dog they want to spend their life with. Apart from the very first and very last dog all my dogs were rescues, most of which were "sticky's" no one else wanted, like Merlin the handicapped GH or Toughy the grumpy Lurcher from a Limerick Itinerant camp. The very last dog was chosen by me not for his breed (although floppy ears are a HUGE plus for an "ear fetishist" like myself) but for his temperament and his ability as a pack dog to fit into my already existing house pack without a hitch or drama. He is from a breeder who is also running a rescue.
However, since middle age as irrevocably (sp) crept in, I feel unable to handle big strong dogs anymore, so this has already reflected on the breeds/types I take into EGAR. No more Great Danes or Johnson AmBulls for me, I am simply no longer able for them physically.