My guess is you were at home rather than going out to work? I can see that being OK since you're comfortable at home.
I worked a job where in the winter you'd drive to work before the sun came up and drove home after sunset in a building with no windows. It was depressing... I'd even call it claustrophobic... but I suppose some people would be OK with it. Different strokes for different folks.
On a related note, I recall reading recently that humans evolved with two types of people (day and night people) because until fairly recent history (last few hundred years), a portion of any group of people would have to stay up all night to keep watch (so animals, etc., wouldn't come in and kill everyone). Maybe you're on of those! I'd feel safe with you on watch all night!