In Tempo, I distinguished between two broad classes of archetypes: generic ones that have names and explicit descriptions, which apply loosely to many people, and specific ones that apply to just one person, and may be only implicitly recognized based on characteristic behaviors.
The more intimately and personally you know somebody, the more you need a specific and implicit archetype. This means that your self-archetype is the one that has to be the most specific. At least if you agree that self-awareness is generally a good thing to seek.
This does not mean that a specific archetype needs to be detailed. It can still be an impressionistic thumbnail sketch that is no more than a characteristic shrug or turn of phrase. It merely needs to be one-of-a-kind; sui generis.
Your self-archetype is arguably the most important archetype in your life. It can be either specific or general, and a thumbnail or very detailed. But most often it is specific and detailed. It is sometimes useful to compute with a very generic, thumbnail self-archetype, to break out of toxic self-absorption.
What do you think is the second most important archetype? Hint: it is not necessarily the one that maps to your significant other.