As a state-of-the-art DNN skin, I have an HTML5 doctype, some CSS3 styles, and just a couple of custom jQuery functions to make my flyout sub-menus look and behave stylish.
I'm a responsive DNN skin. This means I am easy to navigate and I look great on many different screen sizes including mobile and tablet devices.
Photoshop files? I don't need 'em. I'm super clean and lightweight. I don't need a lot of images to support my great looks. My clean style is created almost entirely with CSS.