If you have a nice pair of frames most chicks will dig them. I have a nice pair of Armani frames and Burberry frames. They do make you look a little more serious and intelligent.
I don't wear them in the summer because I can't wear sunglasses unless they're prescription, and in the fall/winter it rains a on.. mostly just wear them indoors or when I my contact lenses are bothering me. I've only ever gotten compliments about wearing glasses. Girls really dig them, but if you wear them all the time then they don't really care.