"Normally I would say "Auf wiedersehen," but since what "auf wiedersehen" actually means is "'till I see you again", and since I never wish to see you again, to you, sir, I say goodbye." is my favorite quote from any film ever.
Really nice rendering; I usually see anime titties and cartoons from you (not that such is an issue; I love both of those things), so seeing that your artistic range extending beyond that is a nifty surprise.