I value

1. a fluent delivery style with good eye contact.

2. good speech structure

3. all sources cited with source name and date

4. clash

5. depth of ideas and analysis

6. richness of language

7. smooth handling of questions

8. consistently active in the chamber

9. change agents--students who are not following a "herd" mentality, but who look for opportunities to make things happen and change things up a bit.