By extending [Jeff Ferland][1] query from [top 100][2] to [top 300][3], here some tags that I'm proposing

* Nuked tags because off-topic: [tag:suggestions][tag:alternatives-to][tag:gotchas]

* Cleanup tags (similar with [tag:documentation]): [tag:reference][tag:guides]

* Gray area: 
 * [tag:setting-as-default]: some questions about how to make an option as default option for client
 * [tag:select]: 5 Questions about how `select` query affect DB performance. Maybe better in SO or DBA.SE. But it falls to [meta-tag][4] because this tag commonly means different things to different people.

<sub>Still updating...</sub>

  [1]: http://meta.serverfault.com/users/3139
  [2]: http://data.stackexchange.com/serverfault/query/59684/top-tags-by-closed-question-ratio
  [3]: http://data.stackexchange.com/serverfault/revision/267129/348916/top-tags-by-closed-question-ratio
  [4]: http://blog.stackoverflow.com/2010/08/the-death-of-meta-tags/