If you're dedicated to your brand, why would you not want to incorporate it at every opportunity? Here's some custom examples of ordered and unordered lists for your CSS design inspiration.
A prime example of incorporating your brand into your web design, EverNote is a paradigm for such dedication to their model.
Behance Network recently updated their site and, among many other improvements, uses an array of unique ordered (and unordered) lists.
Dribbble's social media links are a great example of superb use of custom list items.
.Net utilizes circular listed items for its popular articles.
Simplistic but effective.
Who doesn't love them some Tebow? The dude has a rocket arm, can barrel through defenders, and is a beast of an athlete. To top it off, his website (made by Purple, Rock, Scissors) utilizes subtle double-arrows for list items.
Brand New's site uses a minimalist yet branded approach.