I hate the blinds being open. The sun always seem to shine right in my eye or on my screen. Drives me nuts. I always moan at the cabin crew to shut all blinds. Makes a far more relaxing flight.
Can't really see the point of looking down at endless blue ocean or White snow myself. Seems a bit selfish to keep the blind open mid flight. Fair enough on coming in to land when it can be interesting, but not during the flight.