I think mine choice would be Danish. I had a friend at work from Denmark and she was one of the nicest people I've ever met. She use to tell me Danish words for various things around the office and also told me about interesting places to visit in Denmark. Unfortunately she moved to another state so that source of language practice is gone.
Anyway, I've heard all the warnings about the Danish language. Supposedly its the most frustrating Scandinavian language to learn - almost never is pronounced the way its written. Still, the Danes I've met have left me with such a good impression of their country I would really like to take a vacation there to see it for myself and to interact as best I can with the locals. Yes, I know almost all speak English, but I would think it would still impress them if someone took the time to get a working knowledge of their language.
