Here's a couple:
Sirgod:
"All fear my wootage! At least really admire my wootage, anyway."
Punisher:
"Attempting to sound rational since 1998" (Sorry bro....just a poke in the ribs about mediating fights over on the SL boards)
Hstapath:
"Now go away, or I shall taunt you a Second, Time'AH"
Khalee:
"Hey...how do I make this fried dish, anyway?"
Don Dawson:
"no...I'm not DD, he was that other guy"
ToastyO:
"Because I said so, that's why!" (I'm still wondering if Toasty isn't really my mom in disguise)
JMM:
"What do you think I should do with my garden? It keeps my mind off of how sh*tty the Internet service is down here."
Corbomite:
"What's my favorite TOS episode? Well...DUH!!!"
Taldren_ANN
"You wanna post here? What's the secret knock?"