The romantic in me says: It's all part of the commuter experience, you know man vs nature with the help of a properly outfitted bike and some technical clothing. Living in Minnesota I have to embrace the seasons or it will make me go insane. So when it comes right down to it I find some way to enjoy any kind of weather even if sometimes that enjoyment is derived simply from surviving it.
But in all honestly the thing that really keeps me on the bike everyday is my self imposed lack of access to a car. My wife and daughter take our cars everyday in totally different directions and I refuse to buy another car. So I suppose I could take the bus but I have no idea of how to do it.