"Nothing like a brush with death to... make you not like death much."
Alistair from DAO. He's got a few others, but meh, I can't remember em all.
Also, From Planescape Torment:
Nameless One: I wonder what it was I said that made death reject me.
Still the Nameless One: Well I, for one, plan on discovering the secrets of the multiverse by rubbing cottage cheese on my belly and eating vast quantities of fresh-water fish. Mmm... cheese.
And an exchange between the dual-crossbow wielding Companion Cube and the floating skull:
Nordom: Attention; Morte. I have a question. Do you have a destiny? A purpose?
Morte: Is Annah still wearing clothes?
Nordom: Affirmatory.
Morte: Then the answer is yes.
Another between those two:
Morte: Hey Nordom, calculate the easiest way for me to snuggle with Annah's pillows.
Nordom: Annah, Morte wishes to snuggle with your pillows!
From Morte:
Morte: C'mon, Chief! We're in a building with some of the sexiest chits this side of the multiverse, and you're stopping to talk to *modrons*?
Even a random NPC bystander gets in on the lolz:
Elderly Hive Dweller: [Upon The Nameless One telling her that he is an adventurer] "I'll bet ye've got all *sorts* o' barmy questions!" She mimics your heroic stance: "Greetin's, I have some questions... can ye tell me about this place? Who's the Lady o' Pain? I'm lookin' fer the Magic Girdle o' Swank Iron, have ye seen it? Do ye know where a portal ta the 2,817th Plane o' the Abyss might be? Do ye know where the Holy Flamin' Frost-Brand Gronk-Slayin' Vorpal Hammer o' Woundin' an' Returnin' an' Shootin'-Lightnin'-Out-Yer-Bum is?" She spits. "Dung, all o' it! Only gets ye in the Dead-Book! I ought ta kick ye in the shins fer even pesterin' a poor ol' woman about it all! Now go away an' leaves me in peace!