Here are some excerpts and a link to an interesting article from the experts on the subject... a bit dated but still relevant to this discussion...
Bottom line up-front - people are finicky and ultimately mutual willingness for positive interactions, deeds and outlooks (resolve to reconcile) are more important than perceptions of compatibility...
The Truth About Compatibility
Expert opinions on love and compatibility, and the interaction between biology and behavior.
"We talked to a variety of experts who could be expected to provide insight into these key qualities. From family researchers to matchmakers, each has watched countless couples draw together and pull apart. And each suggested the same thing: We're looking at love all wrong."
"Compatibility does not hinge on some personal inventory of traits. Compatibility isn't something you have. It's something you make. It's a process, one that you negotiate as you go along. Again and again. It's a disposition, an attitude, a willingness to work."
"Compatibility is overrated." —
William J. Doherty, professor and marriage and family therapy program director, University of Minnesota
"Sensitivity to the issue of compatibility may be in and of itself a sign of trouble. My research shows that there is no difference in the objective level of compatibility between those couples who are unhappy and those who are happy." —
Ted Huston, psychology professor, University of Texas, who runs the PAIR project, a longitudinal study of married couples
"Personality is important, but no one really knows how to match personalities up. People are sometimes attracted to like personalities and sometimes to different ones. Relationship skills, on the other hand, can always be improved, and they'll help any two people—with any two personalities—to get along better." —
Robert Epstein, Psychologist
"People might agonize and think; 'Do we have the same likes and dislikes?' But people are not aware of how powerful self-fulfilling prophecies are. We have expectations in a relationship, and we tend to make them come true. The most satisfied couples are those with overly rosy views of each other." —
Lisa Diamond, assistant professor of psychology and gender studies, University of Utah
https://www.psychologytoday.com/us/articles/200409/the-truth-about-compatibility