Honestly, I'd have to care first to even bother insulting anyone. Tho, I truly enjoy sarcasm and 'cultured' insults that you can say with a nice smile on your face. Anyways, there you go:
-I would love to insult you, but I'm afraid I won't do as well as nature did.
-Sometimes I need something only you can provide, that is your absence.
-Your infer......