I came, I saw, I conquered.
The brightest, most vivid subtype -- within the limits of type, and in general.
Most similar of all to his type's description. Nuance: the Dominant introvert is more extraverted (especially not in a socionics understanding, but in Eysenck’s understanding, i.e. lively, sociable, and outgoing), but still displays pronounced characteristic features of his type. If the normal introvert, upon getting tired of communicating, will just go "hide in a corner", the Dominant will drive everyone away and still be grumbling loudly, saying, "Everyone keeps walking around here!"
He is the most realized, especially in the socio-cultural sphere; I think that most famous people, i.e. well-known actors, writers, politicians, etc. fall into the Dominant subtype.
In a group he is also the most (bright, strong, intelligent -- depending on the base type). The logical is "the most intelligent", the ethical is the most excitable, the sensor occupies the most space. That is, the sphere of his "achievements" and the specific way in which he attracts attention to himself and becomes the leader depends on his type. Dominants take the leadership explicitly, especially if they are ethical, sensing, or extraverted. Logical-intuitives do not always deliberately seek to lead, but must: "so that no idiots can order me around".
If the Dominant leaves the room, the impression created is that not just one person left, but a large portion of the people.
Among people of the Dominant subtype, if they are stuck in one group, there is strong competition, even if their intertype relationship is quite comfortable, and there is no serious "reason for fighting".
The easiest way to say it is that the Dominant, firstly, pulls attention to himself, and secondly, "gives orders". Furthermore, he is blunt, if he uses some sort of manipulation, it is rather crude. Usually he just says what he needs from you. It infuriates everyone except Normalizers. In commanding and giving orders, Dominant does not just give out the task, but also his confidence -- he provides the energy to perform that task. It is possible to "go a long way" on his energy, simply join his initiatives and help him implement them (but, of course, go only in the direction where the Dominant needs you to).
Strangely enough, the Dominant responds calmly to minor quibbles, to requests (from Normalizing) to adhere to a specific order. And they may even actually adhere to it! If there is no Normalizing nearby, the whole tangled mess is sent to the furnace or into the trash, and all matters.
In his 1st function the Dominant works "at full steam" and even more. In that sense, it's not just hidden somewhere processing information -- in Dominant it is evident at all times. If this is Te, he is not just busy all the time: he is working on three jobs, and in between speaks and teaches others what they should do. If, however, he does not work, he thinks and does various actions in his imagination, and then, once again, speaks about it, aloud and loudly, with confidence and an air of authority. (For this display, you need to multiply the usual manifestations of the base functions times three)
If, say, the Dominant is Hamlet [EIE], it is not just emotions, but such emotions from which the whole group "get excited" [Translator's Note: the word here is actually "колбасит" or "sausage", which apparently has some weird slang meanings in Russian], while Hamlet "generally does nothing" and sits quietly.
Dominant Yesenin [SLE] manages to command what you do.
Dominant Balzac [ILI] is energetic and rudely sarcastic.
Dominant Dostoevsky [EII] is sort of "an iron fist in a velvet glove": after a demonstration of softness and ethics emerges an equally demonstrative condemnation and desire to "educate".