Do you find your stress greater with one or the other? It could be several things, including what was going on with the Moon at the time of your birth.
Mainly, though, I think it's just your sensitivity to the lunar cycles. Consider the effect these cycles have on the tides on Earth. And consider also that our bodies (including our brains) are made up of so much water.
I have also tracked, in addition to the lunar phases, the distance of the Moon as it swings close to, then distant from, the Earth. These also have effects on the earthly waters, including of course we humans. There is one magazine, "Horoscope GUIDE" that will tell you when the moon is at either extreme (perigee or apogee) and you might find it interesting to track them, too, and see what, if any, is added to the things you've already noticed.