going with the infantile phone messages, I had a great Q line from (I think it was) Deep Space Nine :

(first me, saying): R. and E. aren't here.
(then Q): "That's right, blame me. It is my lot in life to the galaxy's whipping boy. Heavy is the burden of being me."

and then there was the time i had Riker saying:
"Could somebody get that? Can someone answer that damn ringing!?" (I don't remember the episode, but Troi was made into a cake)

Then, of course, my favorite, the Red Dwarf theme song playing in the background and me saying we weren't there.

These stupid ass messages prompted my mother to elave equally obnoxious messgages... "Rory, it's your MOTHER, the Terminator."