I guess I counted the years since I competed for the very first time at the age of 4 ........ I can't really pick a "start year" other than that, because we've always done it.
I ALWAYS wear sunglasses. I'm a wuss when it comes to sunlight plus it keeps dust/wind out of your eyes. And I might be an eye doctor ****cough, cough*****...., maybe.
I wear Maui Jim sunglasses for riding. They have the rubbery temples on the sides so where you put them, they stay. Never had a problem with them falling off.