For casual everyday wear, I have tended toward the safety sunglasses used in industry. Adequate ANSI ratings, excellent impact protection, very resistant to damage, attractive price point, and above all they make them in sizes that fit my melon.

I love and prefer the polarized 'fishing glasses' but I seem to have a talent for chewing them up.

Naturally I would choose more robust and better rated 'shades for high altitude work. No room for second best up there. My eyes are my living, after all.