After visiting Norway in the summer, the only thing that would give me pause with regards to living there is the winter. I live at 41°N right now and I think winter has to much darkness. Imagining the opposite of the Norwegian summer I experienced is a bit much for me.
It gets better though, so by february the worst bit is over. It's not really that awful - you really get a physical sense of the year progressing, and in a sense the darkness is cozy. Lots of light in the cities, starry skies in the countryside. Get some solarium tan going and spend a week or two of vacation time in warmer parts of the world and it's not at all bad.