im VERY interested to hear your thoughts on the blood aspect... its one that i think is taken very much at face value, and is somewhat limited in the traits often ascribed to it (responsibility, heritage, friendship).
Though we have canonical explanations for the Aspects, you're correct in that they often get reduced down to face-value. It was a problem I encountered myself in my early analyses; human beings are multi-faceted, and thus, so are these aspects which are meant to represent many concepts within humanity as a whole. That was something I had to learn to ascribe to my classpect analyses.
My analyses now use four keywords I whittled down from the canonical descriptions as well as the wider concept I understood it to convey. This is an attempt to portray these aspects as multi-faceted as opposed to what is commonly done in flattening them down into only one concept. (IE, "Blood = Friendships, Breath = Independent, Light = Smart, Mind = Logic, Hope = Religious, Rage = Anger", and so on. These words aren't necessarily wrong, but they're definitely not right either, and they definitely don't fit everyone within those aspects. They do not encapsulate the full scope of the aspect as a whole, which means they do not encapsulate the full scope of whatever classpect they are applied to, which then provides a flat, confusing, or biased classpect analysis.)
From The Extended Zodiac, I pulled these keywords from the Blood Aspect description. These would be the "canon" traits; they are what I adhere to when analyzing, but it should also be understood that this concept encompasses much more to do with than these keywords. Its "vibe", if you will, is much more than what is written.
TEZ Blood Keywords: Bonds, trust, camaraderie, groups, inspirational, relationships, friends and allies, charismatic, uplifting, magnetic, (sullen, unkind, set-in-their-ways)
None of the above traits are inherently good or inherently bad. The Blood Aspect, like all the other aspects, is inherently neutral; it is neither good nor bad, but merely a representation of a concept we experience as human beings.
I will say that responsibility is definitely a core trait of the Blood Aspect, but the aspect should not just be limited to that trait and its synonyms. Responsibilities, promises, relationships, camaraderie, community, bonds, connections; these things are what Blood is about. The ties that bind and the blood of the covenant are strong themes for the Blood Aspect.
I would personally say that Blood is what drives humanity, community, and many cultures. That is not to then say that Breath, its inverse, has no place in humanity either; too much of anything is never a good thing, and these aspects have inverses to balance them out accordingly. This is also part of why I so strongly believe inverse classpecting is important to consider as well, as you must be aware of how you should balance to be able to balance, but I digress.
Blood does not just value the relationships they have. They can also be the core of their friend groups, the thing keeping their family members together or in touch, so on and so forth. I believe that particular concept is termed "Unity". They bring people together, which is very powerful.
This is why Karkat, as a Knight of Blood (Active Utilizer), was able to bring twelve extremely different and difficult people (including himself) together long enough to succeed at an extremely convoluted, long game session. Kankri on the other hand, as a Seer of Blood (Passive Knower), was not experienced in his aspect and wasn't able to bring his friend group together a long while before they decided to scratch, but that did not mean he wasn't trying; as inane as Kankri's rants were, they were founded from his understanding of Blood as someone who only understood it from the point of view of the Breath aspect. Had Kankri reached godtier as a Seer of Blood and fully properly understood the Blood aspect, I believe he could have succeeded in the same fashion Karkat was able to.
This got quite long, my apologies. I did not think I would have this much to say! I hope it was intriguing for you.