My question to you would be what is your score on the I/E. I know i follow many of the traits you described, besides the zodiac.
I prefer to work when surrounded by chaos, i have discovered that this is because it keeps the part of my brain that loves day dreaming distracted. TV works as well, but when i was in college, my favorite place to do my homework was in the Student Union at the table my friends always overtook, while they played magic, talked, or worked.
Group studies are a waste of time.... what part of introverted did you not get. unless it is with very close friends who i know well nothing happens, or i just end up teaching everybody everything.
As far as the ENTJ(on average i score low 50's for introverted and identify as an ambivert), i have noticed that i do have a tendency to switch when i'm in some situations, especially when i end up in a leadership role.
Point of the story. At the end of the day i am an INTJ, i enjoy drinking my evening tea while reading about stock trading, or learning Italian because why not and I can.