I played chess a lot in my teenage years and I was very good. Italian Champion under 12, under 18 and under 20, fide master with 2 international master norms.

Then I decided to quit. It was incredibly fun, but also a lot of work which is not going to pay off unless you become a very strong grandmaster. I'm still thinking what a loss it was not to spend that "teenage energy" into doing something more profitable.

But it was so fun that I'm thinking about a comeback :)