I love riding my road bike to work, not as nice as the ridley with the race wheels though... I like going fast, I like being nimble, I like being able to somewhat hide from the wind. One or two days a week I'll go with a big back pack with a bunch of clothes and the rest of the week I go really light, rice, and my flat kit. Probably, would just take the train if I didn't have a bike I thought was fun to ride.
I ride in the cold, but I really don't want to ride to work in the rain (no snow here really) just because I don't want to be wet the rest of the day. I rode to the train station the past year in the rain and cold on a hybrid, and it put me in a foul mood. Still, I'm thinking about getting shoe covers and some kind of rain jacket/pants that I can wear when it's over 70 farenheit for more then 10 minutes without feeling like I'm in an oven.