I am a newly minted crazy biker. I was always hesitant for fear of ice but I'm not finding that to be a problem. What is a problem (as mentioned already) is poor snow removal on the part of the city (Minneapolis in my case). They didn't declare an emergency after the last storm and so now we have to bike in the car lane on many streets. I'm also finding curb cut areas that I think are under city control that have not been cleaned.

We pay a lot of lip service here to promoting biking and we build expensive bike bridges but sometimes you have to take care of the mundane maintenance details. If you don't bad things can happen (like bridges falling down).