Leave it to Vaughn Bell to find this stuff: emotional maps of different cities. Got to get a hold of this -- and as Vaughn explains, you and I can, with free download. (But leave the author some $. It's the right thing to do.)
Nold came up with the idea of fusing a GSR machine, a skin conductance monitor that measures arousal, and a GPS machine, to allow stress to be mapped to particular places. He then gets people to walk round and creates maps detailing high arousal areas of cities.
The biomapping website has some of the fantastic maps from the project.
His book, called Emotional Cartography: Technologies of the Self contains some of the wonderful maps images, but also chapters by artists, psychogeographers, designers, cultural researchers, futurologists and neuroscientists who examine the relationship between space and the self.
The Biomapping site is also wonderful, check it out to find the emotional map of your favorite city.