Hello Amanda,
It is a hard decision. Nolee's hair stays about the length of Rangers, (I get the groomer to keep it that lenght) but I keep it in a puppy cut around the face and keep the top knot. I have let it grow longer, but prefer it short on him. I feel it keeps him looking as my little puppy I first brought home!
PS: I will grow if you don't like it! As you can see in my avatar it is longer and my siggy is puppy cut!