Except when they get hit with a basketball and cut into your nose, when a dog's head smacks into them, when they fog up, when you only have a split second to get the binoculars up to get a quick look at a bird, when sweat drips onto them, and when you're working of drywall and get all that dust right in front of your eyes. Oh, and when it's bright out and you can't just throw on a pair of sunglasses.
Other than that, I'm usually pretty happy with them.
Oh, and you're all looking quite lovely, ladies. I'd compliment individuals, but I don't want to leave anyone out. Or creep anyone out.