Pictured: The main ensemble.
Not pictured: Hundreds of other characters.

Here's a description of all the characters:

J.G.: Me as a yellow circle.

AVERAGE JOE: Just an average joe that does unaverage things.

SHADEZ 4 LYFE: An adolescent who dreams of YouTube stardom. Is very much into superheroes.

MR. WILLIKERS: First name is Gerald. Wanted to become a scientist but failed, so he became a high school science teacher instead.

REDHEAD GUY: A guy who's a redhead (surprisingly).

ALL-AROUND VIDEO GAMER: Another guy who has a gaming channel.

NYPD_83: Yet another guy with a gaming channel.

THE POWERPOINT ANIMATOR: Some guy from Spain who animates with PowerPoint. Is also into superheroes.

BORED MARKER: A red marker who always complained that he was bored, so he started a YouTube channel. (Maybe it's a pun on “board marker”?)