Lots of interesting replies.
I don't know about anyone else but my views of what a Black Belt is has changed so drastically over the years that I have dozens of different ideas on what a black belt is.
When I was a little kid I thought Black Belts were Ninjas, capable of the most fantastic things.
When I was a young teenager I thought Black Belts were incredible martial athletes capable of great physical accomplishments, and amazing fighting ability
When I was in my late teens and fighting in the streets for a while I thought black belts were a good way to judge my own ability to fight and a good bragging right to beat in front of my peers..
When I was just out of my teens and actually started Karate for the first time, I thought Black Belts were masters of the knowledge of how to do the martial art.
When I was an advanced belt in Karate I thought Black Belts were people who had knowledge of the curriculum, and had improved their own skills a certain amount.
When I earned my first black belt I thought Black Belt was the new starting point for myself and learning in the art, and the example for all lower belts to learn and strive to be like.
When I earned my second Black Belt I thought Black belts were people who should be able to self correct themselves and their own technique as well as their students.
When I earned my third Black Belt I felt I realized that being a black belt is so much more beyond the physical aspects, and started working on my diet, and mental aspects more.
I wonder what my opinion of a black belt will be next year... or in 5 years...or 30 years?