T.P.-
Aichi is an all right place, though I actually lied about it being the best Japan has to offer. What can I say right? Nagoya is a large city with a lot to do, but I'm actually living a little bit away from Nagoya.
I studied Japanese for 4 years at my university in the U.S. I graduated in June of '05, then came out here. My Japanese is pretty sound, I think. I have a J girlfriend so that helps.
I would recommend studying Chinese if you are interested in business opportunities. For pure enjoyment, however, Japanese is certainly interesting and a challenge (takes a lot of work). Also, there are far fewer speakers of Japanese in the U.S. than speakers of Chinese, so that is something to consider. Let me know if you have any other questions, because I have plenty of experience with life in Japan.