Calling one's self an expert implies that you've completely mastered something, so I don't fully believe in that term, rather I want to continually strive for mastery knowing full-well that there are always new things to learn and discover. It's a subtle, yet distinct difference that doesn't put a cap or end point on your endeavor, which allows for a long relationship with your passion(s), which will benefit your motivation when times are tough.
Posted by Nick Venturella