Anyone else want to join in on the character talk, go ahead.
ESTJ - Jack, Frank, Pickett - Jack's an emotional guy, but his primary is still Te. Logical and objective in his environment as a leader.
ESTP - Kate - I think ESTP females are often stereotyped as trashy, shallow kind of girls, but Kate is still an ESTP, just not a stereotypical one. Caring and values genuineness, but her hurtful acts towards others is her way of evading capture. She may be emotional, but she's still a logical and objective headstrong T, an ESTP promoter. She cries a lot because of her problems in life - which would hurt any T.
She may also like having a quiet life, but she is not an introvert, her energy is driven outwards, not forced inwards.
ESFJ - Sawyer, AnaLucia, Alex - Sawyer is unhealthy. He appears very T, but he's an unhealthy F, protecting himself with a "shell" so he doesn't emotionally attach to anyone, so he pushes them out by acting like a T, but he's very much an F - his feelings are what drives him to do what he does. "Me against the world."
Ana's feelings are also what drove her to all that aggravation and in-your-face attitude.
ESFP - Charlie, Hurley, Shannon, Nikki, Cassidy
INTP - Ben, Locke, Faraday - I really felt for Ben when he was beat up by Jack. I know what it's like to be an INxx type and physical ability is not one of our fortunes
INTJ - Rousseau, Patchy
INFP - Boone
INFJ - Desmond, Eko
ENFP - Claire, Juliet, Annie
ENTJ - Miles
ISTP - Sayid
ISFP - Sun, Libby?
ISTJ - Jin
ISFJ - Michael?
Naomi and Mr. Friendly - ExxP?
The rest of the characters aren't shown thorough enough so I can't type them. In the meantime, new characters are introduced almost regularly, so maybe this thread could keep going for awhile.