Post rating options other than stars?

For the past few months we’ve been using star ratings on our posts, and we love them! We’ve made some customizations to how they work, but we wanted to try a simpler option to providing a rating for the post (similar to how you can give individual comments a simple thumbs up or thumbs down.) Is there any option for rating the actual post outside of stars?

The page I need help with: [log in to see the link]