I haven't spent any time in the Arctic Circle but it's been an itch I want to scratch. The last 10 years I've been based at about 19° S but I went and spent half a year in 46° S. Arriving in summer, my brain kept thinking it was 4PM all the way to 9PM :-) Short winter days would race by. I found myself thinking 'day over already?!' a lot. The advantage was you were always discussing the dawn beauty with neighbours as everyone saw it.