After playing so many games i had to mute them i case i started murmuring the lines in my sleep.
My favorites have always been Aelirenn, Alchemist and the Dorregary:
"Humans to the sea!" (so gleeful, it's hilarious)
"If anyone asks...*perfectly timed pause* you've not seen me." (you can almost smell the sweaty paranoia as he bolts, cloak in hand)
"I do not mince words, on, principle." (This guy could give Shatner a run for his money)