Is this episode my favourite? Yes
Is this episode the best of all time? Yes (In my opinion, Cape Feare is a close second)
Is Hank Scorpio my favourite character? Absolutely!
Nostalgia perhaps is one reason why this is such a great episode for me, but it is so well made, the plot is a true classic and I can watch it until the cows come home, and continuing watching it even after that for it is truly a masterpiece not only of animation television but TV as a whole.