I always press to the "sky" on Flying geese no matter the color. Imho anything else creates too much bulk at the point. If the sky is light,as well as light weight, and I can see the seam underneath, I try to make sure I clip the dark so that it is not showing.
All that said, you need to find what works for you. What method are you using? I am a big fan of the 4 at a time method. If you have quite a few to make, check it out.