It's a thin line between the two, but not difficult to stay a professional.
Being called a "real pro" is one of the nicest compliments you can get regardless of what occupation or endeavor you pursue. Of course, that only applies when pro signifies professional and not procrastinator.
As you know, there is a very thin line between those two words. We have thousands of otherwise real professionals who cross that line with the following very unacceptable behaviors: