What are some examples of the best, worst, underrated and overrated episodes?

Best Episodes: Scott Tenorman Must Die. Casa Bonita, T.M.I., Bass To Mouth.

Worst Episodes: Pip

Underated Episodes: Bloody Mary, My Future Self n' Me, The List, City Sushi

Overrated Episodes: I Should Have Never Gone Ziplining, Pee, Sarcastaball

There's many not mentioned but these are the ones that come to mind. Pip is the only episode that I can say I truly hate, many episodes from the early seasons could get dishonorable mentions.