I was in Auberdine tonight after some PvP action (all my characters had just rezzed) and someone asked me if I was "like the zerg". So I chuckled and, with my main character, said we were a hunting party.
The with my second character I said "He's training us!"
Then with my 4th I said "But not very well, as you can tell"
And with my 3rd I said "Hush now! Show some respect!"

Anyway, it went on for a few minutes with me arguing with, essentially, myself. I got quite a crowd.

It's funny that some of the best RP I've had lately has been with myself.