As best as I can figure, I won't wear tights in my casual life because I wear them to work. Not that I should wear tights at my blue chip firm, but I do, because I am always one notch too casual for the activity at hand. Were I to win one of the few, but coveted, Oscars given out for management consulting work, I would show up in a Diane von Furstenberg wrap dress. It would be very pretty, but completely too casual.
In deference to Amanda, as well as my well-documented love of all things thermal (I am still trying to justify someday purchasing a thermal tank top I've been visiting at Urban Outfitters), I purchased these thermal tights at Old Navy. And you know what? Tights function surprisingly well as tights!