Let them speak!

Warning: This is not for the weak of patience!
RPHelper2 http://wowui.worldofwar.net/?p=mod&m=2914

You can install this mod and have your alts react to events in game. No offense to those who are into the lore of the game but I edit out stuff like "Remember the sunwell!" and replace with something like "Well, that was easy." Believe me when I say that this takes some time to set up but if you're tired of your alts just hanging back like dummies you can do this for a lil added entertainment.

There is also a similar mod called Battlecry which I have not tried.