Originally Posted by Trisquire
So for our purposes, a cloudless sky is as good as a cloudy one?
Clouds are indicators, not gurantees. There may be thermals under those clouds but whether you can reach them or not is another matter.
Clouds also offer contrast and reference points that are missing in a clear sky. It is easier to judge if you are climbing or sinking with clouds in the sky. And planes are often more visible against the clouds then the blank blue sky.
I like some nice white fluffy clouds in the sky when I fly. If nothing else, they look nice.