In terms of light I love this time of year. Waking up when it's dark and watching the dawn break is my morning routine. I also enjoy going to bed when it's dark.
Where I live we get our fair share of rain during these darker months. My photography takes me into the forests, even on days of light rain. This is the light I love. It's soft and the rain clouds don't create bright spots in the open areas. The greens of winter don't have have as much yellow as you find during the spring. Which is another factor when working working with winter light.
This is not to say that we don't get bright blue skies and clear days. We do. On those days I need to be out early to photograph before the sun tops the trees.
If you spend any amount of time photographing nature I hope you can find the beauty of the shorter, darker days that comes with winter.