In theory I want to commute to the office by bike all of the time, regardless of weather. In practice, there's a quiet part of me that's cheering the snow flurries on. There can be a certain sapping of biking motivation on grey cold days, and a bit of me that thinks of the warm TTC (even if it's kind of more annoying and slower).
(I know I like biking, just like I know it does me good to get outdoors on winter weekends. Do I reliably go outdoors on winter weekends? Well...)