Not only do you know that striped tops work for you, you know what kind of striped top works for you.
And, while you may have preppy tendencies, I think this kind of top can span style boundaries. When Kurt Cobain, Ines de la Fressange, Picasso, and Kate Middleton all wear the same striped top, you know you have something.
(And yes, this was on my essentials list, as well!)