After couriering all day in a Toronto snowstorm:
I really enjoy working in the winter some days, especially when the streets are clear and the air is brisk. And nothing beats doing 180 slides when the snow is just right (not while on the job, though!).
By the way, if anyone is looking for a kick-ass cycling jacket in the future, take a look at the
Loki Myth. It's worked really well for me this winter.