Reputation

I have maxed all reputations.  Although I do not know for certain what reputations are the absolute best to grind.  Depends what gear you desire.  For damned sure, get the following five to rank 10:

Arcangrove, Brightoak, and Mythsong:  Stonecrusher

Evil:  Necrotic Sword of Doom

Good:  Potent Honor Potions

See Factions for a complete list.

And make sure to come buffed and with proper gear for max rep, preferably on double rep days!