[Athenian200]

Some INTJ's can be outwardly emotional, especially under stress, or around people they're fairly comfortable with. Fi is perceived as particularly moody/dramatic in some cases. I know that after knowing a few INTJ's and seeing their feelings, I've been able to detect the Fi undercurrent in almost every INTJ's comment. There's always a bit of Fi in that Te... although it may be difficult to get them to admit to it at times.

This makes sense to me because I'm an INFJ, and people have perceived me as cold, formal, and tending to over-analyze situations (although that's only a very minor part of my self-image). I would guess that has something to do with tertiary Ti in my case.

As for the other NT's:

ENTP's: Can use emotion in describing the greatness of their ideas, to further a goal, to revel in their accomplishments, etc.

INTP's: Can be clingy/pathetic, as well as self-loathing. Sometimes do the emotional equivalent of a child laying on the floor and locking their arms around their parent's ankles when they're about to leave.

ENTJ's: Reflected in the strength of their will to achieve their goals, as well as the importance they place on their desire to do something, and ability to place their trust in their own values and forge ahead.