I've had the same pair of Oakley half-jackets since 2002. I wear my sunglasses ALL the freakin' time. I love the half-jackets 'cause you can change the lenses out. I have two frames.... silver and black. And blue polarized, orange polarized and black polarized lenses. I also have yellow lenses (for shooting) and clear lenses. Yes, I even wear my sunglasses at night, mainly during this time of year. We have a lot of people that like to spit in our faces, and if I get spit on, the glasses do a good job of keeping it out of my eyes.
I recently thought about buying another couple pairs of the new Flak Jackets. If you take care of your glasses and don't lose them, for the money (maybe $200 depending on your lenses) I think these are the best you can get.