I'm ashamed and embarrassed that this thread got to 50 pages before I could contribute, but c'est la vie. First cycle-commute since December. About -3C, breezy, grey. I did my old familiar route through mainly residential and trails, some main roads. The main roads were fine, residential was mostly okay - there was almost always a bare strip of pavement to ride on - but the trails were horrible. Hard, rough ice and crusty snow that rattled every bone in my body, even with a front suspension fork and 2" tires.
Also, I've apparently misplaced my hill-climbing legs.
Nice to get that first commute of the year out of the way, though.