Well, that may be true for you, but in some cases, the true type
doesn't change. Like an ex-colleague of mine who is a trainer - she
can be very loud, outgoing, etc. but I was very surprised that
she's an I, actually. That's her true type, no matter how her
behavior can change. It just means that at the end of a working
day, she just feels very very tired, coz she has to behave like an
E during her work 
