That said, ExxJs may well give soliloquies. but saying
"Ok, he doesn't talk to PEOPLE much, but I mean, he is the epitomy of soliquoy and dramatic speeches"
as an argument for Hamlet being an E makes it sound as though soliloquies are exclusively, or at least mostly, the providence of Es. If that's true, forget classing Iago, MacBeth, or most of Shakespeare's other leads as Introverts: they all soliloquize right and left.
I feel soliloquies are useful for determining type due to their content, but not really based on the fact that a character does or does not give them.