Ok... favorite roads...
I have several.

Tracy Road
runs between US ROute 9 (Exit 30 of Interstate 87) and Mineville NY
length: 8 miles

North Hudson Road
runs between US Route 9 and Moriah, NY
length: 10 miles

Vermont Route 17
Runs from VT 116 from Bristol VT to Buels Gore VT
Length 15 miles
the last 4 miles of this to the top of the Gore is nothing but hairpins, switchbacks and 'rally-able' terrain as you climb a fucking mountain!
the backside drops you into Mad River Glen, same type of terrain.

NY Route 86
Runs between Jay NY and Wilmington/Lake Placid, NY
weird terrain, corners, elevation changes and evil rock walls and guardrails to keep you from plunging into high falls gorge!

US 20 through the Berkshires I always enjoyed.

And I love the madness of the 401 through Toronto with the 16 lanes!

Out west, my favorite route is I-84 from Portland eastward to Salt Lake City. You got nice scenery along with the insane Cabbage Hill switchback.

A few of mine:

Paved:

Peterborough County Rd. 46 to Northey's Bay Rd - Near Stoney Lake, ON - 2 AWESOME roads... watch for deer and decreasing radius corners. Total length of two combined is probably about 40 km. Just doing the speed limit on Cty. rd 46 can be a challenge in some spots.

Northumberland County Rd 24 - Perfect pavement, lots of hills and tight corners, weaving through the forest. About 20 km long.

Flinton Rd - Just east of Tweed, Ontario, runs from Hwy. 7 to Hwy. 41 in Northbrook. 18 km, and about a million corners of varying radius running through deep forest, rocks, etc.

Rally-ish:
Beaver Road - Campbellford, ON - 5.4 km of winding, loose gravel road, lots of decreasing radius corners over crests.

Hubble Road - North of Havelock, ON - 3.8 km, lots of corners, loose gravel (also very fun in the winter), very narrow in spots.

5th Line East, Campbellford, ON - 12.8 km, some nice corners, hard not to get the car sideways on some of them

Blue Ridge Parkway. Lots of fun. Not to mention some UE opps. along the way if you get off at some of the more non tourist places. Lots of fun on a bike too. Look it up on google if you never heard of it.

Non paved then Red Turner Road. Close to the house to get my off road jollies out when I need too.

anything outside of my province

Posted by Nismo anything outside of my province

Actually, autoroute 105 (I THINK), that pretty much goes from Ottawa to Maniwaki is awesome... I drove my boss's chipped Audi TT quattro out there thursday night.. wow.

My dirt road to my grandmothers cottage.

I'll post the map later.