Well, I kinda lie to myself about these kinds of things but at the end of the day I am pretty evidently instinctual type in internal structure. This is because the anger is repressed and generally internalized. The problem is that I don't really fulfill certain US cultural norms that are all over typology, but I am evidently anger based person when you sum it all up (1w9 to be exact). Actually I was often comparing myself to you and thought "If Lumi is anger based then what am I?". Since I am evidently more angry person than you, even if most people have no direct idea about it at face value (since in this case my wing and both of fixes are camouflage types).
Therefore in practical sense I am pretty rigid and high on standards. There are situations in my life when it is obvious that everyone gets more serious just by realizing that I am coming their way. Or they do preventive "It wasn't me! It wasn't me!" as soon as I come into room. Plus I am the guy that made a new schedule for my teachers when thing got messed up. Basically out of everything I can make a decent working plan and I am basically "stabilizer" and lecturer almost everywhere where I show up and engage. What is all powered up from intense internal source. I even got accused that I lecture the lecturers. What was true at the time and incompetent leadership really really annoys me.
This amused me because I am quite likely also more angry than people realize, though my response is definitely different than yours. I can also be rigid and have high standards, though this has softened a lot over my life, and no longer being under the same roof as my e8 (angry) father. And I know that some people, at least in the past, have felt the need to be on their best behavior around me (I didn't realize that at the time, however). I attributed it more to them not wanting to disappoint or corrupt me, though, rather than to not anger me. The latter is definitely possible, though. Moreso in the past than now, I think (and hope, since one of my most important values is to respect other's autonomy.) Your response about how anger is actually good for you is particularly interesting to me.
Is it your most often felt emotion?
This is difficult for me to answer because, like RadicalDoubt mentioned, it's like it's there and then I forget about it. I think it's possible I've felt it for so long that it is normalized. Anger, resentment, frustration, irritation those combined are definitely high on my list of emotions I experience often, at least.
Is it your strongest emotion?
It's one of the strongest, but I think love is the strongest, along with feeling protective of that which I care about (which could include fear of losing it). Though I guess being protective likely falls under the category of anger in that I am attempting to shield someone from whatever is wrong.
The hardest to deal with?
Mmm. One of them. Anxiety and fear of loss are the others. Earl Grey told me recently when I asked if I seemed like an angry person, "You have the capacity to it, but it seems that when you feel it, you react as if you had just fallen into sewage." That's very true. I don't like feeling it. At best, it feels a nuisance. It may be over something small and inconsequential, and I can ignore it and not act on it, but it's still affecting me internally. It may be over something I have no control over, and then I've struggled with knowing what the heck to do with it. I may lack impulse control and act in a manner that isn't congruent with who I am/want to be in response to it. I should try to look at it more like Virtual ghost and see how it can be used for good.
Do you struggle more with it than others?
Anxiety the most, anger second most. It's probably not as obvious to others. Or maybe it is to those who are around me all the time, since some of it does come out verbally, in the fact that I need to verbally process it sometimes. I try really hard not to rant, though, in part because my father did that ALL the time while I was growing up, and I know how awful it is to be around that.
How often are you in that state?
I guess there's usually some anger simmering somewhere inside me. Generally it's not ferocious. It's more a state of unhappiness with the state of the world and that there's little I can do to change it. Lately, more and more, though, I have been more free from it. I would rather be happy, and I am making conscious, deliberate effort to achieve that.