Wow................ I have trained dogs for over 12 years and can not give you a favorite breed............ but I can give you some favorite individual dogs. Now, that is easy.
In my years of training I have had a doberman, red healer, mini schnauzer, cardigan welsh corgi, pit/lab mix, rottie, cocker spaniel, husky mix, german shepherds, mastiffs and all I can say is they are all WONDERFUL when taught the right way to behave............ yeah!!!!!!!!!!!!! gotta love it. Is one better then the other or more favorite?
Not really. What do you want the dog for and I can give you a better answer.