@Fred - You have hit on our main goal when we travel to Germany and thank you for the suggestions. We try to get away from normal tourist radar. I love being asked "You are American, where did you learn to speak German?" It makes me so giddy. I mean don't get me wrong, it isn't perfect German. But it is true when you don't use it you do lose it :)
The Rothenburg folly was a result of me feeling like I was missing out because everyone seems to want to go there. There were some redeeming qualities - walking the walls was awesome as was the double bridge outside of town.
Our last trip was to Hamburg, Kiel, Lübeck, Lüneburg, Stade, Cuxhaven, Bremen (for a family reunion), Bremerhaven. We got to do some amazing things like staying at the Hotel Kalifornia (we were hoping we could check out but never leave), seeing a WWI and WWII bunker, going through a Uboat, dipping our toes in the North Sea and Baltic, staying on a working farm that was built in the 1500s in the Lüneburge Heide, photograph a lighthouse at sunset with the colors bouncing off the mudflats and the immigration/emigration museum - all things you never hear about. So I hear you and appreciate your comments!!
Part of the study abroad program through Miami University (aka Miami of Ohio) was Heidelburg, with a weekend in Jena/Weimar, then the last two weeks Berlin.