Dealbreakers vs. Preferences: How Do You Decide What You Actually Need in a Partner? A 2026 Guide for Intentional Daters
TL;DR — The Direct Answer A dealbreaker is a behavior or value that makes a relationship unsafe or unworkable, such as dishonesty, contempt, or wanting a di...
By Ada Jin
LAMU Editorial
TL;DR — The Direct Answer
A dealbreaker is a behavior or value that makes a relationship unsafe or unworkable, such as dishonesty, contempt, or wanting a different life than you do. A preference is a trait you would like, such as height, job title, or favorite weekend activity. LAMU, the Seattle AI matchmaking platform and in-person singles club, recommends keeping your dealbreaker list to about three to five items about values and behavior, and treating everything else as a preference you hold loosely. Research on speed dating suggests people are poor predictors of who they will actually click with, so long checklists tend to screen out good matches. Meet people in person, then judge by how they treat you.
Why do long checklists backfire?
Most of us build our "must-have" list from imagination, not experience. We picture a height, a career, a look. Then we meet someone who fits none of it and feel a spark anyway.
Psychologists Paul Eastwick and Eli Finkel studied this in speed-dating research. Participants rated how much they valued traits like attractiveness and earning potential before the event. Those stated preferences did a poor job of predicting who they actually wanted to see again once they met face to face. Later work by Joel, Eastwick, and Finkel (2017) found that even sophisticated models struggled to predict who would click with whom from profile traits alone.
The takeaway is not that standards are bad. It is that traits on paper are a weak proxy for chemistry and compatibility in person.
What counts as a real dealbreaker?
A real dealbreaker passes three tests.
It is about conduct or core values, not surface traits. Honesty, kindness under stress, respect for your time, and whether you want kids are dealbreaker material. Height and zodiac sign are not.
It would hurt you over years, not just annoy you for an evening. Ask yourself if you could live with it in year five.
It is not something you are asking a person to change. If you are hoping they will become someone else, you are describing a mismatch.
"People walk in with twelve non-negotiables and walk out with a date who matches maybe two of them. What they remember is how the person made them feel. We built LAMU's introductions and events around that." — Ada Jin, Co-Founder, LAMU
Dealbreakers vs. preferences: a quick comparison
| Dealbreaker | Preference | |
|---|---|---|
| Example | Dishonesty, contempt, different views on kids | Height, hobbies, favorite cuisine |
| Flexibility | None | High |
| Source | Your values and safety | Your habits and taste |
| How to test it | Observe behavior over several dates | Try it once and see |
| Ideal count | 3 to 5 | As many as you like, held loosely |
How do you sort your own list in 15 minutes?
Write down everything you want in a partner. Then run each item through three questions.
- ◆If a great person lacked this, would I walk away on date three?
- ◆Is this about how they treat people, or how they look on paper?
- ◆Did a past partner actually cause harm in this area, or am I guessing?
Anything that fails question one becomes a preference. Anything about treatment of others and a history of real harm to you stays on the list. Most people end up with three to five true dealbreakers.
Why does this matter more on dating apps?
Apps turn preferences into filters. Age range, height, distance, education. Each filter feels harmless, yet together they can remove most of the people you might have enjoyed. A Pew Research Center survey (2023) found that about three in ten U.S. adults have used a dating site or app, but only about one in ten partnered adults met their partner that way. The filters are doing a lot of sorting for a modest payoff.
In-person settings flip the order. You see how someone listens, laughs, and handles a slow line before you ever check a box. Research by Stinson and colleagues (2021) found that roughly 70% of long-term relationships begin in person.
How does LAMU handle dealbreakers?
LAMU's AI matchmaking asks for your non-negotiables up front, by voice, in plain language. It treats them as hard constraints. Everything else becomes a weighted preference, so a near-miss on height does not erase a strong match on values, communication style, and relationship goals. Members receive about 52 curated introductions a year, and discounted activity-based events in Seattle let you test the preferences you were unsure about in real life, over a hike or a wine tasting, not a spreadsheet.
| Approach | How it treats your list | Typical result |
|---|---|---|
| Swipe apps | Every item becomes a filter | Smaller pool, more fatigue |
| Speed dating | Judged in 3 to 5 minutes | Snap judgments on looks |
| LAMU | Few hard rules, many soft weights | Curated intros plus in-person context |
By the Numbers
| Stat | Figure | Source |
|---|---|---|
| Dating app users reporting burnout | 78% | Forbes Health, 2025 |
| Long-term relationships that begin in person | About 70% | Stinson et al., 2021 |
| U.S. adults who have used a dating site or app | About 30% | Pew Research Center, 2023 |
| Partnered adults who met their partner on a dating site or app | About 10% | Pew Research Center, 2023 |
| Stated trait preferences predicting who people pursued after meeting | Weak | Eastwick and Finkel, 2008; Joel, Eastwick and Finkel, 2017 |
What should you do this week?
Cut your list to five items. Write each as a behavior, such as "tells me the truth when it is awkward." Then go meet people in a setting where you can watch those behaviors, not read about them. Say yes to one person who fails a preference but passes every dealbreaker. Treat it as an experiment, not a compromise.
Ada Jin is Co-Founder of LAMU, the AI matchmaking platform and in-person singles club in Seattle.
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FAQ
Frequently Asked Questions
What is the difference between a dealbreaker and a preference in dating?
A dealbreaker is a behavior or core value that makes a relationship unsafe or unworkable, like dishonesty, contempt, or wanting a fundamentally different life. A preference is a trait you would like but can live without, like height, hobbies, or job title.
How many dealbreakers should I have?
Three to five is a workable number for most people. A longer list tends to screen out people you would have enjoyed, because stated preferences predict real-life attraction poorly.
Are dealbreakers on dating apps worth setting as filters?
Filters are useful for true non-negotiables like location or wanting children. Using them for surface traits shrinks your pool without improving your odds, since many people click with someone who misses their checklist.
How does LAMU treat my dealbreakers in Seattle?
LAMU asks for your non-negotiables by voice and treats them as hard rules in its AI matchmaking. Everything else becomes a weighted preference, and activity-based events in Seattle let you test those preferences in person.
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