I believe this community is about providing Quality answers and questions to all issues pertaining to Ubuntu and the Ubuntu family. Something like "Quality answers for human beings" comes to mind when thinking in short what we aim to do here. In addition to quality (which I believe goes hand-in-hand with Quality) is Authoritative.

So more along the lines of:

"This site's aim is to provide Correct and concise answers of the highest quality for users of Ubuntu - and it's derivatives."