No matter how good or bad someone's first impression is, spending enough time with that person usually changes it.

Even the worst first impressions soften over a year or so as you begin to notice the good sides of that person. Conversely, no matter how great someone seems at first, spending a long time with them reveals their flaws. That’s often why relationships fall apart. As people become more familiar with each other, their partner’s flaws become more apparent, and once those flaws pile up past a certain threshold, they can no longer tolerate one another.

…Not that I’d know …