Because the Internet exists for the sole purpose of making ordered non-topical lists about our favorite things.
Three quick notes before we begin:
1) None of this is actual criticism; it’s nerdy, “Genius At Work”-shirted nitpicking purely so we Simpsons-obsessives can talk about The Simpsons. Think of it like a Bible Study, but with more important source material.
2) The examples here are confined to seasons 2-10.
3) This list doesn’t include out-of-character moments where the out-of-characterness is the joke itself, like when Homer puts on glasses and instantly recites the Pythagorean Theorem. This is a very important distinction (in a very important internet list).