Regular show: Rigby Edition

Rigby's personality

Rigby can be best described as a "wild adult", even though he is past his teenage years. He becomes frustrated, frightened, confused or sad all too easily, making his behavior very predictable. Rigby is also very arrogant, impulsive, impatient and immature at all times, giving him the personality of a child. In this way, he is a character foil of Mordecai, who demonstrates far more responsibility and maturity than him (in most conditions). He even changed his name to Trash Boat one time because he thought it would sound cool.
However, Rigby cares about his friends, as he tried to help Pops with his fear of giving speeches, saved Muscle Man from drowning, saved everyone from a pack of evil hot dogs, and got angry at Pops when he was taking wrestling too far and hurting Mordecai. He also felt bad for Benson after he said he was going to lose his job.
Rigby has become somewhat more responsible and thoughtful to his friends as the series has progressed, tending to complain less about work and sometimes even accomplishing difficult tasks, such as taking on Skips' chores in "Fists of Justice" and cleaning up the park ballroom for Margaret's party in "TGI Tuesday." However, he still often causes chaos by taking shortcuts or engaging in irresponsible behavior, such as using a machine to pump up in "One Pull Up" instead of trusting Eileen's training to get the job done. These efforts usually result in bigger problems than the ones Rigby was trying to avoid in the first place, along with the occasional near-destruction of the entire park.