I love it!! I find it rewarding & comforting & I only ever get it if I truly earn the words. He says this so I know when I pleased him well.
If I didn't like it, I would ask Him to maybe call me something different because "Good Girl" sounds:
"condescending & makes me think I didn't really do a good job..." or "like you're talking to your dog..."
and suggest an alternative.
I would think most Dom's would prefer the feedback. Doms care about their subs & want for us to be happy too!