Every compatibility tradition — from synastry to the four temperaments to modern personality typing — is trying to answer the same anxious question: will this work? We spend most of our time on this site exploring those traditions, and we enjoy them. But an honest publication about compatibility owes you one article that puts the cards on the table.
So here it is: the checklist we would actually use. The factors below are drawn from mainstream relationship psychology — the kind of findings that have held up across decades of couples research — placed alongside the traditions we cover, with a clear label on which is which. The traditions give you language. These factors carry the weight.
None of this is meant to make compatibility sound like an exam. Most of what follows is not something you have so much as something you do, together, repeatedly, for years.
Shared values, not shared hobbies
Couples routinely worry about surface mismatches — she loves hiking, he loves staying in — when the research points somewhere deeper. What predicts long-term satisfaction is agreement on the load-bearing questions: children, money, religion or its absence, ambition, where home is, what loyalty means. Two homebodies with opposing views on family will struggle more than a hiker and a homebody who want the same life.
Values rarely announce themselves on early dates, which is why they belong at the top of a checklist rather than at the mercy of chemistry. Chemistry is real and it matters, but it is famously bad at screening for values.
Conflict repair: the skill that outranks everything
Every couple fights. Decades of observational research — most famously John Gottman's work — suggest that how couples fight, and especially how they recover, distinguishes lasting relationships from failing ones far better than how often they disagree. Contempt, stonewalling, criticism and defensiveness are the warning signs; we walk through them in our guide to the four horsemen.
Repair is the counterweight: the joke that breaks the tension, the hand on the arm mid-argument, the "let me try that again" an hour later. If you want a single question to sit with, make it this one — when we hurt each other, do we find our way back, and how quickly?
Your attachment patterns shape this too. A person who reaches out under stress paired with a person who withdraws under stress will have a very different repair loop than two secure partners. Our attachment styles primer covers the basics, and what secure love looks like describes the destination.
Humor and friendship
It sounds too soft to be science, but shared laughter shows up again and again in studies of satisfied couples — not because jokes fix anything, but because humor is how couples signal we're okay and regulate tension together. Underneath it sits something plainer: do you actually like each other? Friendship — genuine interest in each other's inner world — is the quiet foundation that romance is built on and returns to.
Life logistics: the unglamorous layer
Nobody writes poetry about compatible sleep schedules, but ask any long-married couple what they negotiate most and you will hear about money styles, tidiness thresholds, in-laws, chore division and calendars. Logistics are where love becomes daily practice. A mismatch here is rarely fatal — but an undiscussed mismatch curdles into resentment, which is.
Desire alignment
Sexual and affectionate compatibility deserves its own line, because couples so often leave it off the list until it becomes the list. The question is not whether desire is identical — it almost never is — but whether the difference can be talked about without shame and negotiated without scorekeeping. How each of you prefers to give and receive affection matters too; our love languages guide offers one popular vocabulary for that conversation, with the usual caveat that it is a framework, not a diagnosis.
The checklist, as questions
A checklist you fill out alone is a mirror. Filled out together, it becomes a conversation — which is the entire point. Here is ours.
| Factor | Question to ask together |
|---|---|
| Core values | Do we want the same life in ten years — children, place, money, faith? |
| Conflict repair | After a fight, how do we find our way back — and does it work for both of us? |
| Humor and friendship | Do we laugh at the same things, and do we genuinely like each other's company? |
| Life logistics | Can we run a household — money, chores, calendars — without one of us silently keeping score? |
| Desire alignment | Can we talk about sex and affection honestly, including the mismatches? |
| Stress behavior | Who do I become under pressure, and can you live with that person? |
| Growth | When one of us changes, does the relationship stretch or crack? |
Where the stars fit
So where does that leave astrology, and everything else we write about? Honestly placed: as reflection tools. The tradition's real gift is vocabulary. Saying "I'm a fire sign and you're an earth sign" is often an easier opening than "I feel like you slow everything down" — it names a difference without assigning blame. A synastry reading can surface questions a couple has been avoiding; it cannot answer them.
The same honesty applies to our own compatibility matcher. It compares charts the way the tradition prescribes, and we have built it carefully — but it is a conversation tool, not a verdict. No pairing it flags as difficult is doomed, and no pairing it flags as harmonious is finished work. We have written before about why soulmate scores mislead: the danger is not believing in astrology, it is outsourcing to any system a judgment that only the two of you, talking, can make.
Use the traditions the way you would use a good novel about marriage — for language, for recognition, for the occasional uncomfortable insight. Then close the book and have the conversation.
If you would like a structured place to start, run your pairing through our compatibility guides and treat every line of the reading as a question rather than an answer — or go deeper into what your own chart says about how you love with a natal chart reading. The stars are a fine place to begin talking. The checklist is what you talk about.