Shutterstock: reinforcing the stereotype that girls don't tech..
I've often told my artist friends (painters, actors, writers, etc) that until you get paid for your work you are an amateur. You doesn't need it to be all your income, but someone needs to be willing to pay for your work.
Last week I photographed an event for pay at a professional rate, and people were happy with the results. So, based on this criteria, I am removing the word "amateur" from my bio everywhere and just referring to myself as a photographer (and relaunching my photography site with a professional voice).
The story of my career.