This compulsion has changed a bit over the years. I actually wear pants during the summer now... however, nowadays I won't turn on the heat for the season until I've reached a point where I'm sitting here shivering. This means lots of hot chocolate (just awful, I know), and a tendency to wear hats like the following:
That fabulous creation was intended to be part of my Red Fraggle costume for Halloween this year. The pattern can be found here; the brim and pigtails are a strand of red and orange Fun Fur held together, and the body of the hat is TLC Cotton-Ease.
The Red Fraggle costume idea has fallen by the wayside in favor of River from Serenity/Firefly, but the hat still needed to be seen.