Crazy: Even if you're wild about the woman you're dating, you'll eventually make a mistake. Maybe you'll forget to call when you said you would or show up to dinner a half-hour late. Even if you have a perfectly valid excuse, Ms. Crazy flies off the handle and refuses to drop the issue. Hell, you're on dessert and she still hasn't let up about how you don't care about her. Instead of basing her argument on the incident in question, she uses it as a springboard to make wild generalizations about how you never keep your promises.
What's more, she'll bring up this singular incident a dozen times going forward. You'll be walking on eggshells for weeks thanks to that missed train that made you late. Bonus points if your minor infraction leads to a major public meltdown in said restaurant.
Keeper: A woman with a healthy attitude can take tiny issues in stride. If you show up late, she makes it a point to express that she's annoyed, but has moved on by the time the appetizers have hit the table. She resists the urge to generalize, and instead focuses on the larger picture. Her mentality: You made a mistake. You're only human. You're generally on time. No need to ruin dinner.