What functionality is missing? What is unsatisfying with the current situation?

  When looking through the list of feature suggestions, it is easy to lose track of the suggestions already visited or voted for, which leads to lots of page reloading and wild clicking (in my experience).

How does this feature request address the current situation?

  I would like to propose that the items in the feature suggestion list be marked as visited or voted. This might either be achieved by adding colour to visited/voted suggestions (similar to a visited hyperlink) or, and this is my personal preference, adding a little badge to the list item (e.g. an 'I voted!' badge).

What are other uses for this feature request?

This differentiation may also serve as a gateway to filters based on 'unvisited' or 'unvoted' suggestions.