I plan to still ride my roadbike when I can during the winter, but I'm gonna get a mountain bike so I can keep peddling during the winter when it's too bad for my roadbike. Gimme some advice O'dog...

should I go hardtail or fullsquish?

"Always go straight forward, and if you meet the devil, cut him in two and go between the pieces." - William Sturgis, clipper ship captain, 1830's.