Hmm, when I lived in VT (but didn't have a bike), I used to love Route 100-twisties, rolling hills, waterfalls, quaint country stores. In the area I live now (Waltham), I did a ride through the Townsend State Forest-maybe 119. That was a real nice road too. Tiverton Rhode Island has some great cruisin roads too. It's pretty rural that way so basically you can't go wrong.
This is a great idea, I would love to see what others are riding in New England! Be a great addition to the site too maybe a regional ride guide with maps and suggestions for food and gas.