You know the wool sort in the shops, but I want a warm one not the thin ones that I've seen that will be hopeless in winter!
Black or a dark red colour (but black means I can wear any colour underneath without looking like a peacock if I wear colours!)
Zip? I find buttons so fiddly when in a hurry, although they are probably smarter...
Fit and flare shape.
And hopefully under 100 pounds!