I'll give you that sometimes he thinks of unique plans, but that's because he's smart, not because he's N. He can think multiple steps ahead and plans accordingly.
So Dexter is confident and INTJs are confident, therefore Dexter is INTJ?It's not that the above traits are limited to INTJs but INTJs out of all types are far far ahead of all other types when all those traits are put together.
And Dexter is absolutely certain of his ideas.
He is sooo very confident in himself (actually his ideas).
When it comes to feeling confident (of their thoughts, ideas etc) INTJs are far ahead of others.
I've found the ISTJs in my life to be extremely confident, especially in their contingency plans. They seem to miss no detail at all -- they're one of the most if not the most thorough type.
I just don't see the Ni whatsoever. When is he abstract? Besides the Brother Sam thing this season, he just isn't interested... and it seemed like this season was the first time he even thought about God, and that's only after seeing the religious murders.Those are my simple points in favour of Dexter being INTJ.
Dexter is not a INTJ, he is a stereotypical INTJ, except for his murderous tendencies.
The narrating is also super S.