I love my little sociopath..but he's making me CRAZY!!!!

I know that children learn best through repetition, god knows I get it! But my youngest son has taken this to new heights.. His thing is this, anything he sees, he has to tell me which one is his favorite. Anything. It could be something on a cereal box, on a toy, on t.v. Absolutely anything. I could handle that, but there's always a catch.. He needs me to repeat it. "Which one do me like mama?" Just to make sure that I'm paying attention. And if I don't repeat it right away, I hear this (in a very loud voice) "SAAAY IT" It is literally gnawing away at my soul, and unfortunately it doesn't end there.. He then wants to know which one is my favorite.. Let's take one of his favorite shows "Franklin" He's told me that his favorite is the beaver "Me like the beaver mama, who's your favorite?" If I even think about saying that I like the beaver too, he'll go nuts and insist that HE likes it, and I can't.. or if I pick something that his brother or father have already claimed as their favorite, then it's meltdown hell again.. I try. I really do, to be patient, and I'm not kidding when I say that for the past few weeks, this has been one long conversation about favorites. He does this from morning til night..I've been praying for more patience with him, I can see his little face contort when I give him the look that says "I know who your favorite is..you've already told me 50 times today!!" I know he's just trying to get some attention from me, and this is how he chooses to do it lately. But pretty soon I'm going to lose my shit.. Why can't he just kill bugs or small animals? Like other sociopaths?