Folks, I think this 1st video (in a series definitely WORTH watching), pretty much explains it all, when you need to know what it takes to be a professional photographer:
MWAC Attack-Episode 1: The Camera
Remember, if you wanna be a "Pro", make sure and use the "P" setting on your camera, as that THAT is the professional setting on your cameras.
Of course, most all of the quality folks here on the list knows this already.
ps. Do make sure and give this whole episode a watch, and the next ones are pretty 'informative' too.
... Speechless lol