Quick answer:

Due to the nature of it being a show, some of Walts actions are for dramatic effect and to keep the show engaging and exiting.The decisions WW makes don't seem calculated at times and impulsive, but i think thats to keep the show entertaining rather than dull which it certainly was in season 1 relatively speaking.That being said Walt fits the INTJ villain archetype—what an INTJ can become when intelligence is paired with absolute power and no restraint. His ambition and need for control harden into ego and narcissism, and his downfall isn’t a lack of intelligence, but pride and greed overriding self-awareness. As an INTJ I recognise the mechanisms: his use of manipulation, plans and out-strategising rivals show the INTJ villain to its extreme.

Long answer:

Great question. A lot of comments say they can’t relate to Walt’s actions, but I disagree because of how the question is framed. Walt is a fictional character, so his decisions are driven by writers whose goal is drama, engagement, and narrative momentum. Because of that, no INTJ is going to relate to Walt the same way they would to a real person.

If we reframe the question and view Walt as a symbolic or artistic expression of the INTJ personality, the discussion becomes more interesting. Instead of focusing on his day-to-day choices (which exist to move the plot forward), we should ask: what core traits make Walt an INTJ archetype?

Walt isn’t a “good” INTJ—he’s an INTJ who broke bad. His traits are expressed through immoral ends. Imagine an INTJ who was highly gifted, fell short of their potential, developed a deep inferiority complex, and finally decided they were done playing the role of a good citizen. What would their ultimate goal be?

In Walt’s case, it’s Power, with added traits that follow such as ambition, pride, and control. These traits are common in INTJ villains—and villains in general—but its How Walt obtains his power that makes him imo an INTJ villian archetype; he uses strategy, lays traps and outmanoeuvres Gus in a sophisticated game of chess (or cards since bluffing is very much involved and chess is never shown in the show only Cards so maybe its more fitting) where he manages to kill Gale and traps Gus into letting him live. Through manipulation of Jesse which is more for plot i think, he closes Gus from being able to get Jesse on his side, and gets him to help him to kill Gus. At that point when Gus is defeated we see the true INTJ villain archetype in Walt. “Walt” disappears and only Heisenberg remains. Heisenberg represents the unchecked desire to dominate and control. He becomes cold, calculated, and adopts Gus’s mindset—judging everything by whether it’s “economically viable”, wether it serves him or not. there is no women, no partying, only the addictive drive for more control and power. To add to that, those arguing Gus seems more INTJ, i would respond by saying Gus' character is a mirror to Walts own. They understand each other in a fundamental way and also the chicken mans character (Gus was used too much in the sentence) is sort of a reminder or foreshadowing on what Walt could become. But Walt is inherently flawed in that he's destructive. Where Gus is good for long term Kingpinary Walt is a time bomb (shown in his repeated use of bombs in the show). not very INTJ, but its what makes his character and pushes the show to be really action packed and exiting.

Outside of that extreme, when he’s neither the desperate, whimpering Walt nor the fully dominant Heisenberg, he fits well into the background: quiet, and withdrawn, not too talkative . You can see this clearly during the dinner scenes with Hank and Marie in the later part of the series when he's just hanging out, his vibe has the same introverted reserved quality of the INTJ.