Mario is old from EP days, he would routinely spam the boards with stuff about himself, dating or his country.
Rumors were he is actually autistic and it sort of does explain the repetition, but that's all I know.
You forgot Crying Troll ("Is it ok to cry?" "What can I do to stop her from crying?"), the guy who worries about his mom being taken by millenials (who also doubles as the guy who is jealous of his older, more successful and handsome brother, and the guy who gets annoyed when his friends walk around in their stinky wet beer-soaked socks in his apartment)
There was Geminii troll, who believed that Geminiis were the best and had the ego to argue with you about it.
Occasionally we see the Ass-kicking girl who enters a fighting competition and whoops all of the bigger, trained men's butts. Also doubles as Ball Busting Girl.