Definitely happier. This is my first winter of bike commuting, and I LOVE the added touch of seriousness that comes with slippery roads and cold! Every weekend I take a lot of my bike apart to clean it, and I really like the feeling of relying on that maintenance on Monday morning when it's five below or whatever. In a way I can't wait for spring of course, when I can ride my road bike in the nice weather. But I'm going to miss the winter commute a little bit too!