I like using light/fast tires; Schwalbe Kojaks on my folder and Continental Ultra Race on my roadbike.
The usual downside is they're more flat prone; especially when they've been used for a while. Next
winter I'll be using more flat resistant tires because it's not fun changing a flat in sub freezing temps.

14 Fahrenheit = minus 10 Celsius by 1nterceptor, on Flickr