Sis and I watch it sometimes if we're up really late and can't sleep. I know someone had mentioned Phil Hellmuth ages ago, thinking he was an ENTJ, and I'd disagreed then, but now I totally get it.
Kenny Tran - ISFP?
Antonio Esfandiari - ENTP (yeah, gotta a little crush going on there...)
Phil Laak - ESTP (appears to be the victim of his own genius)
Phil Hellmuth - ENTJ
Tom Dwan - xNTJ (and I suspect Asperger's...)
Bob Safai - ISTJ
Doyle - ISTJ