Test emotional baseline return
David Bus advises looking for emotional baseline return. Henderson elaborates: people high in neuroticism not only feel worse but objectively experience more conflicts. The inability to distinguish fine shades of negative emotion (e.g., frustration vs. rage) impairs communication, making arguments escalate. A healthy partner identifies and verbalizes what they feel rather than making you guess. Henderson references research on borderline personality disorder, which involves an extreme version of this, but the trait exists on a spectrum. He notes that during conflict, communication is even more crucial, and those who shut down or expect mind-reading amplify problems.
High neuroticism is linked to objective increases in interpersonal disputes and a tendency to overstate suffering. Emotion regulation ability reflects lower neuroticism and higher agreeableness, which correlate with relationship stability.
One of the things you want to look for is are they able to or how quickly do they return to their emotional baseline.

