You don't? I'm also in an area with mostly darkness in the winter and I have to say I do feel depressed, and I wish it was always summer. I think it's the worst aspects about my location. Otherwise I think it's great.
From the name I assume you are from Finland, which I am not, but supposedly Finnish people are the happiest in the World - which I'm not sure if it's actually true. The joke is that every Finnish person after seeing the study wonders why they are the only unhappy one.
I can't relate at all. Where I live the days are consumed by darkness in the winter and I see no effect on my mood or brainpower.