In User Centered Design and Bridging The Canyon of Pain, Scott Sehlhorst comments,

There is such a thing as too much choice. For new users, too much choice (or control) is too much. For experienced users, too little choice is a problem. Ease of use usually comes from reduced control - but users don't stay "new" for long. There's a "canyon of pain" to quote Kathy Sierra in that transition from "new" to "experienced." We call them "competent" users and we have to help them cross the canyon of pain.

Windows greatest strength is that almost everything can be modified, adjusted, customized. That gives it great appeal to power users and those who BUY technology. But in that strength lives a great weakness: because it has so many power features, Windows interferes with new users, those who USE technology.

When defining personas, be sure to define those who are novice, proficient, and expert. What different choices you will make!