I’ve seen every episode from Season 1-10 at least once and there are many that I re-watch on a regular basis, so of course I hear the same riffs many times. Sometimes, there are just certain ones that I remember hearing that I suddenly begin laughing at much harder than I ever had before, even if it isn’t an obscure reference that I realized.
My example comes from The Starfighters during the first refueling scene where Servo quips, “I’m going over to this plane, they got chocolate gas! Um-num-num-num!”
That one never stuck out much until a recent viewing and it ended up getting my biggest laugh of the night.
Have at it!