Do I really need 4WD/AWD?

I am (sort of) in the market for a new car and am trying to consider my options. I currently have a Ford Contour which has been a good car, but it's getting old and I want something newer. My question is, I am concerned about winter weather and HAVING to go to work despite bad conditions or snow emergencies. Would it be a wise idea for me to get a vehicle with 4WD or AWD (like a truck or SUV), or is it just hype and I can still get to work in a sedan? I moved to Dayton last summer and didn't have any trouble getting to work last winter, but the winter was a pretty mild one, so I'm not sure I can use that as a basis for comparison.

Do you guys tend to have cars that can make it through bad conditions, or should I stick with the vehicle of my dreams and just hope I can make it to my destination?