/That line break between “The” and “Princess” was not intentional, by the way. Let me know of you’d like me to reformat that for you.

Pinkie Pie:  
“HiCelestia’sServant!DoYouThinkThatThe PrincessWouldLetMeUseTheMainBallroomForTheMostAmazingPartyThatIWantToThrowForMyFriends?I’llBringMyPartyCannonAndThere’llBeStreamersAndCandyAndCoffeeButNoOatmealBecauseYouKnowOatmealIsJustCraaaazyHey!IfIBringDerpySheCanDoThatThingWithHerEyesHeeHeeHeeShe’sSoooooFunnyIt’slikeThatOneTimeThatSheHay!CouldYouGetMeAnotherCoffee?ILoooooooveCoffeeEspeciallyIfItHasAlcoholInItOooohOooohOooohThatRemindsOfTheTimeThatCrankyLentMeHisCartAndI…”
 
Damn! That was actually hard to write!

Trixie: could I borrow that screwdriver?

(Perhaps not really an interview question, but you deserve this.)
 
Celestia:  
“For your outstanding work, I will now grant you one wish. It can be anything. Well, except for more wishes. So, go ahead, my loyal servant. Make a wish.”

Nightmare moon: you wouldn’t happen to have any stain remover? I don’t know who keeps sneaking in here, but they always track mud onto the carpet.

Nightmare Moon:  
Stop. Who would cross the Bridge of Death must answer me these questions three, ere the other side he see.  
What… is your name?  
What… is your quest?  
What… is the capital of Assyria?

Celestia:  
“Do you think I should cut down on my consumption of sweets and cake? Also, would you like a slice?”

would you consider changing your allegiance if nothing was different with me in charge?  
-NMM

Trixie: “What skills do you have in the field of pyrotechnics? I may require assistance with an upcoming performance in Las Pegasus.”

alright serious now.  
“What would you say to me doing your job, I think I could do it MUCH better.”  
-Trixie

“Tell me, what is it like to serve a pair of celestial body-moving demigods? Are you ever intimidated by their power and status?”  
-Rarity

@sixtyfour  
Yeah, I derped… Early morning here and no coffee yet. Also my cat is drinving me nuts.

Imma use Twilight.  
Do you realise that’s not how you spell alright?

Twilight, ask him how he got his job.