I am not really sure, but I guess the really hard times with my beloved brown doberman are somehow over. NO, don’t worry, he didn’t became an angel overnight, but somehow the last days were more peaceful like ever before. I guess he became a grown up dog, not a silly puppy he was. He actually starts to COME BACK to me when I call him, and this happened “a lot” lately. The other thing I noticed he is behaving much more nicely with me, comes and puts his head on my hand, wants to be petted ….
Not sure if this behavior will last but will keep you in touch if anything changes 
It is good to hear that you achieved great results with your dog. Best wishes for your future training!