Call me crazy if you want (which means you'll be getting on my back too, Marionut), but usually I picture these guys on the Mario boards by how their screennames look. Of course, I know it isn't real, but that's the way I look at things.
For example, I picture Goomba Platinum as, what else, a Goomba. And I picture ParaTroppaCaption as a peaceful Parakoopa. Since I like Koopa Troopas, I see him as one of those friendly message board people.
As for Deezer, well, I don't know what he would look like. Maybe his name should be Dozer (no offense, but I think it's a good joke).
It''s hard to save the world when you''re a penguin in wizard clothing.