Make it feel like the player is there. DOn't take this to the heart, but make the zones as realistic to the game its self. Like if a giant dragon causes terror in a zone and everyone is scared and you step up, that is what I mean.
what i looo for is overall quality animations such as backflip and frontflip barrel roll also, try to let mobioe players talk to npc like trick or treat in hollowsville unofficial one