After a few weeks of reflection, I summarized a quick practical guideline to evaluate whether or not someone is fit to pursue a deeper, romantic relationship with. However, these elements apply for platonic relationships as well as professional relationships.
When choosing a romantic partner to spend the rest of our short life with, its paramount that all of these 5 (there is a 6th one that matters especially for romantic relationships) are deemed as aligned. In platonic or professional relationships not all elements need to align, but the more do, the more long lasting they might become. Slight exception for the 6th element, I don't have data or experience that shows platonic & professional relationships can function with that involved.
Ranked from most important to least important, but still if one of these factors are misaligned, it will criple the relationship and eventually misalign others.
1. Spiritual (agreement on the point of life itself)
There is an unspoken and fundamental truth that everyone believes in as being the point of existing and will determine the decisions made throughout ones life. Whether its a certain version of an afterlife, arbitrary rituals, or conception of the divine or lack thereof. As impossible as it is to see the divine exactly the same, both sides need to be able to operate within a similar spiritual framework. As a friend of mine once said, "you want to be with someone who has a similar level of halal & haram as you." Said jokingly. Arguing about theology may be a fun intellectual exercise between colleagues; but for a life-partner, different views on this topic may lead to misalignment on the most fundamental structure that governs the course of our life, the belief of what ought to be.
2. Emotional (acknowledging the invisible pain)
You can't tell everyone everything. Emotional alignment is when you can tell someone everything and they can tell you everything, and by tell, it doesn't always mean verbally. It can also be in the way both of you get how each other are feeling without having to actively express the emotion. Alignment in this area can indicate relatively equal frequency of each other asking "are you okay?" and when they are not, for them to explain & for us to listen doesn't feel like a chore, but something we'd naturally want to do.
3. Intellectual (no need to dumb down or to pretend to understand)\
Sometimes, we need to explain complicated concepts without having to explain the meaning of every word we say, because if we do, we'll waste so much time in the explanating definitions we often lose the energy to get to our actual point. On the other side, the other person feels like they need to pretend to understand just so you can get to your point, knowing how frustrated you get when they ask too many questions. You want to be with someone with whom your brain is adequately stimulated, not too smart that you're slowing them down, not too stupid that you'd have to simplify too much.
4. Physical (its just, right)
There are two parts of physical alignment, there is the absolute and the arbitrary. The absolute includes matters such as health, fitness, habits, that have a direct influence on quality of life, schedules, and capacity. Arbitrary however, are elements such as height, race, skin tone, eye size, and other non-performance related physical attributes, mostly aesthetics--what people are often refering to when talking about types. You can always be athletic, but you can't become African American if you're Asian. However, being aligned in both kinds of types is crucial for long term relationships so that resentment and insecurity don't build up.
5. Financial (the ability to logistically facilitate life together.
Out of the 5, this is the cruelest in my opinion, because it involves a lot of external factors. The other 4+1 can be absolutely perfect, but if this aspect is misaligned, it can slowly bring down the entire relationship. Financial alignment doesn't necessarily mean both sides have to be equally rich/poor, it comes in the form of having similar money philosophy, spending habits, and access to resource. Money philosophy and therefore spending habits are internal, but access to resource is often dictated by external forces; the job market, gas prices, war, famine, civil unrest, can all lead to the loss of access to resource. Without access to resource, there's simply nothing to build all the other aspects on--the reason I put this last however, is because relationships without the other 4+1 may seem to work on the surface, but is in reality two people trapped in not a romantic relationship but a business arrangement.
There is one more element that was brought up by a friend of mine and i realized is very important:
6. Sexual (similar level of libido)
Once established as a romantic relationship, its crucial that both sides have similar sexual expectations. Because in a monogamous relationship, the romantic partner is the ONLY person that sex will ever be had with. Any form of disatisfaction will lead to frustrations that strike at the existential level -- this needs to be communicated clearly so that the other side may accomodate; or decide, they can't and not continue before too much emotional investment has been made.
Anyways, I am aware these aspects are very low-res. But its good to lay out just as a rough guideline for anyone who intends on going to the next step with anyone.