Looks like you stopped everyone in their tracks with that one, Hammersklavier!
If I could choose any house I've every seen to live in, it would be Vaux le Vicomte in France. Saw it on a school trip 21 years ago, still remember it vividly:
http://www.linternaute.com/sortir/ma...-vicomte.shtml
Julien Valle, L'Internaute
http://upload.wikimedia.org/wikipedi...le_Vicomte.jpg
Eric Pouhier, Wikipedia
http://farm1.static.flickr.com/86/24...9c745f4dba.jpg
Panoramas, Flikr