Wearing a lens designed for bluebird days on a flat light day will wash out the terrain and that does suck. If you're only going to have one pair of goggles, I'd go with something good all-around like the Smith Sensor Mirror. Very good in flat light conditions, and still serviceable on bluebird days. When going with one lens, opt for flat light performance over bluebird performance. A flat light lens while being a bit light for bluebird days will still be serviceable where as a bluebird lens on a flat light day is pretty damn miserable.
When it's snowing really hard, you just can't see shit. Deal with it. I've been on the mountain when it's been snowing so hard and so cloudy that I've gotten vertigo. Just had to sit down because I couldn't ascertain what was up, what was down or whether I was moving or stopped. That kind of sucked. As I was making my way down, there was a brief clearing and there was a skier standing close enough to me that we could reach out and touch each other. Neither of us even realized the other was there until it cleared up a little. Literally couldn't see your hand in front of your face.
"People say that marijuana smoking is going to get in the way of my career. I say to them that on the contrary, my fighting career is getting in the way of my marijuana smoking." -Nick Diaz