I love natural light. I prefer only to work with natural light. But I have raised my white flag and finally gave in. I started using a speedlight.
I have come to accept that during the depths of winter, my little world doesn't have much "natural light". So, when absolutely necessary, I will try to recreate "natural light" as much as possible.
Today as my girls were playing in their room, I grabbed my camera and my light and started playing. Even though the light is not as nice as natural light, I did find that I was able to capture some very nice shots. And I definitely appreciate the increased flexibility being able to create light offers me.