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.
True i did consider that! But Sir Knight seems to relate to that description a lot too, so much so that he described the castle theory to us in great detail, which is why i thought it reflected him.