The only time I make my bed is when I change the sheets. That's once a week, and I only make it then because my mother instilled it in me.

Not making it everyday saves time but more importantly airs everything out and deprives bacteria of moisture. That, makes it less stinky and lets my bedding last longer.

I sleep hot, it doesn't matter what the ambient temperature is. Vermont in winter? Heating is off in my bedroom, and I have a leg out.

Edit: seems like this isn't unpopular. It was a random thought that popped in my head. Everyone I have explained this to thinks it's weird.

I understand the tidy thing, everything else in my bedroom is quite tidy, my life really, with the notable exception of my thought processes.