"Don't RP the LP." note Contrary to popular belief, the "RP" does not stand for Retsupurae, but "Regret Playing".
Retsupurae tried to make "That's fer shore" one, but it didn't stick.
Crouching Moron, Hidden Badass: While his LP of The Lost Levels is filled with his failures, as stated below this was due to him using a keyboard. When behind an actual controller, he's capable of beating notoriously difficult games with surprising skill.
Flowers for Algernon Syndrome: Averted. Billy was originally a target for Retsupurae (and received a Colbert Bump as a result) because he failed a lot playing The Lost Levels. However, it turns out that that was only because he didn't have a controller at the time, and he's actually a pretty skilled player, as seen in later LPs. Despite this, he seems to have kept the fans he acquired earlier.
Glory Seeker: Defied. He didn't start doing L Ps to be famous; he was just interested in making new friends.
Go Out with a Smile: In Billy's last video he left Let's Playing very happy with very few regrets, moving on with his life.
Hidden Depths: In his recent Lets Play of Hollywood Squares on the NES, Billy shows off a surprising amount of knowledge on cars.
Even more bizarrely for their ages, he and his friend "The Lime Popsicle" show an insane encyclopaedic knowledge of 80s sitcoms during their LP of Pinball for the NES, especiallyGrowing Pains.
Incorruptible Pure Pureness: Discussed in his Solitare video; he's overwhelmingly positive in a sea of Internet-borne negativity—especially in spite of all the Retsupurae exposure—but still tries to remain positive.
I want to meet Billy MC in person. He just seems like the kind of guy that throws everyone off because he's actually nice and endearing about everything, with not a bad word about anyone. He's the kind of person who would honestly see nothing wrong with a sitcom character being called "the Beaver". Never change Billy. This world is much too cynical now and you add a badly needed dash of innocence. Never ever change.