i am with you on that. i believe i have the opposite of the "winter blues", or "sad" in summer. i feel better on cloudy rainy days. dark curtains on all windows, especially facing south. fans and a/c on full blast. it is hard my husband tolerates it okay in the interest of "keeping the house cool" but i know other people see it as freakish. the curtains also keep the anxiety level down i can't stand the idea of people being able to see into my house. which is silly as there is nothing but woods across the street. i try to let a slice of light into my living room for the sake of my kids, which is essentially that i parted the curtains a bit, but the blinds are still closed.
so maybe you and i have that in common? it is nice to feel not so alone.