: Introduced Muscle Man’s iconic (and annoying) "My Mom" jokes, forcing Mordecai and Rigby to tolerate his eccentricities to keep their jobs.

: Critics and fans note the animation reached a "sweet spot" during this season—more polished than the pilot/Season 1 but still fluid and expressive compared to later seasons.

: Episodes move smoothly from mundane tasks to chaotic finales.

: High-quality physical comedy, like everyone turning into Susan in "Benson Be Gone".