Enhance the site so that visitors can directly interact with it or among each other, enabling things like user-generated content, comments, voting, chat, or forms for data collection and interaction.
Allows pooled competitions for registered users (best-of-five). Users can view match results, enter match results, and confirm results entered by their competitors.
With authenticated members or members with different roles
The admin role is the only one that handles adding/editing/deleting questions in which members can choose from, the admin is a little control freak but this happens in real world where a site owner wants to have unified and approved survey questions.
Authenticated members or specific roles, on other hand, can choose from these PREDEFINED QUESTIONS for their pages, which they, authenticated members, can also add PREDEFINED ANSWERS to, if the questions are set to have multiple answers.
Lastly, the site visitors or other users can rate, vote on questions, choose answers and add comments.
Uservoice, have you ever used it? Perhaps, you like Uservoice useful features. However, whether you want or not, you have to pay monthly fee to use it.