bludragon,
As you found out, our state has some beautiful roads. Don't know what part of the state you went through, but I have a few favorites, depending on where you want to ride.
I live in SE Wisconsin, about 25 miles or so, west, north west of Milwaukee. Right in my back yard, we have the 'Kettle Moraine' State Forrest. This is an area carved out by glaciers many years ago, and they left behind some nice twisties, hills and valleys. The area extends from around the Illinois border, to almost 1/3 of the state to the north. The whole SE portion of the state is nice to ride, if you stay away from Milwaukee, Racine, & Kenosha counties... Not that they are ALL bad, but that is the highest concentration of cages, and traffic can get crazy.
A bit further west, near the Wisconsin Dells (a very popular summer tourist area), you can take Hwy 33, north west in the direction of Lacrosse... Hwy 33 rolls through woods, farm fields, hills and valleys, and ends up at the Mississippi River. Near 'Wild Cat Mountain', the roads will test even the best sport bike riders

Then you have 'up north' as folks from WI call it... Seems that anything north of Hwy 21 is 'up north'

Wisconsin has more lakes than Minnesota, and some of the best roads I've ever been on. You really can't go wrong, once you pick an area to ride, but I'd say that the 'River Road' (Hwy 35), from Lacrosse north, Hwys 8, 70 or 2, way up north, and once in Door County (the 'thumb' near Green Bay), any road you choose (although quite a few tourists during summer and fall).
Here is a pic, taken this spring, less than 20 miles from my house...
Here is a link, that will show some of the roads I mentioned.
http://www.milebymile.com/maps/Wisconsin_road_map.pdfLet me know if you have any other questions.
Black Dog