If you map MBTI onto big five, you allegedly get E/I = S/R, N/S = I/N, T/F = E/A, and J/P = O/U respectively. That leaves open the possibility of L and C (limbic and calm) subtypes of any given MBTI type.
So, presumably there are INTJs who have strong emotional reactions to situations, moodiness, and who may be more prone to stress/anxiety, while others are better able to relax, take things in stride, and not get worked up.
I also find the Te-bound and Ni-Fi subtypes interesting. Could be why I sometimes think I might be an INFP, though I do rely on Te a fair bit too.