Horatio Caine: INTJ
Calleigh Duquesne: ESxJ? She can be a bit of a wild card.
Eric Delko: ISTP
Ryan Wolfe: a ESTP with OCD (explaining some of his J-looking traits)
Natalia Boa Vista: ESTJ
Alexz Woods: INFJ
Jesse Cardoza: ESTx
Walter Simmons: ESFJ
Tim Speedle: I haven't seen many episode with Speed. Probably an ENTP.
Any thoughts, suggestions, etc? More characters to add?