I'm thinking Beta, a Perceiver, because of the reasons already said about the general feeling of aggression, your dislike of detailed instructions sounds Te-devaluing, and I feel like wanting your job to show who you are is more Se/Ni than Ne/Si.

In regards to the "Castle Theory" sounding like Creative-Fi (this is really to WorkaholicsAnon), it may be that that was how the theory was explained, and so it sounds like creative- not because Sir Knight is Fi-valuing, but because that is how its remembered.

I was initially thinking Ni, but now I am also considering Se.

But that's just what I think.