MovableType helped sponsor a styles contest. There are 146 entries. You can browse through them at thestylecontest.com/browser. You scroll across to see the thumbnails. Click on a thumbnail to zoom in. There are about 20 “pages” of thumbnails, so use the page links at the top right to go through those.
If you see one you would like to use on your site, look for the name (on the left) and let me know. I’ll help you get it loaded. If you like having a random photo banner, or just random photo, think about picking a style that will work with a photo.
For example, I picked out “Rudimentary” and set it up on Stonegate.