I think Walter White is a Gamma NT. On the Breaking Bad thread, a lot of people typed him as Delta ST, but I think that's wrong. He shows clear disregard for his body, wanting to roll over and die instead accepting the chemo, and also in driving his car into opposing traffic. That shows weak Si, imho. Plus, when he says, "we're in the empire business" towards the end of the series...well, I can't think of a more Ni influenced quote.
I'm also inclined to type Jesse as Fi-ESFp, with most of his character's motivation being defined by his "flexible" ethics of relations, where he's in homoerotic love with Walter one minute and spurning him the next.
All in all, I think it's a pretty Gamma show, what with theme being a gradual unified progression (Ni) towards a comeuppance for ethical transgressions (Fi).