I wouldn't go so far as to say "that's the worst possible typing" lol.
some guys in the socionics community typed him as LSE (ESTj). Its a little hard for me to see it at first but I can still see it.
Have you ever met an ESTJ? They're masters at talking fast. I would say they're THE BEST personality when it comes to talking fast and saying shit on the fly. When I was in the military, ESTJ's were the ones who were obsessed with the sound of their own voice. They have this quality where it sounds like they're surfing on the sound of their own voices.
Here's an example of the "voice surfing" I was talking about. Skip to about 0:44, lol.
Translate this talent over to rap and you've got a great rapper.