What makes a TV couple realistically compatible?

Communication about conflict (they actually talk instead of just drama), shared values beyond romance (they want the same life), and realistic challenges (they face normal couple problems, not just plot twists). TV couples with genuine compatibility tend to be steady shows; couples built on drama tend to burn out.

Do the most watched TV couples have the best compatibility?

No. Dramatic couples get attention (conflict makes good TV). Compatible couples are boring to watch (which is why they're less centered in shows). If a TV couple is fascinating because they fight constantly, that's usually incompatibility masquerading as chemistry. Real-world couples would break up.

What TV couples would actually stay together?

Couples that communicate despite conflict (they argue but work through it), that grow together (they support each other's changes), and that maintain intimacy (regular sex, affection, quality time). These aren't the flashy relationships—they're the boring ones that function.