After a winter's worth of experience, I though I'd share some knowledge, and take notes for myself for next winter.
These are my favorite work pants. They are sort of wannabe Carharts, but they are Dickies, are tough, and they fit me perfectly. Actually, I think I look darn good in 'em!! I sort of get tired of jeans sometimes, so I was really glad when I picked these up. Decently warm, and I can fit my silk long underwear under them for those sub-zero days. Very important.
A lot of the other days I wear my old running tights or sweats. The tights look thin, but they are really very warm, AND they are easy to step into the boots with. Also important.
Easier to wash too. You got it - important.
This is the "Hat and Hoodie" layering style. A cap can be substituted.