Here’s What Really Makes A Couple Compatible, According To Experts But what are some signs that you are a good romantic fit? Whether you’re still in the “talking” stage or have officially defined the relationship, you might be curious about what makes a couple compatible. Well, there is no one answer. The key is finding a partner whose personality and essence match up with yours. And, when there are areas where you and your partner’s personalities and habits diverge – say, you’re a homebody but your partner is an avid club-goer, or the two of you have different dietary restrictions due to your different religions – hopefully you’re both willing to make a few compromises.