We are all very different when at our best than when we are at our worst. We can even seem like two different people. This isn't a rare case of "multiple personality disorder." Rather, it is simply that when we feel good we think clearly, while when we are stressed we may get angry.
We all have met people who bring out the best in us. Around them, we feel better about ourselves. We think clearer. We act kinder and more elevated. Around other people, however, we might sometimes behave our worst.
This will be true for you, and true for the person you are married to. Your task is to bring out the best in yourself and the best in your spouse. (And before you complain that this seems unfair, remember that your spouse has the same task!)
A husband and wife who know how to bring out the best in each other will live blessed lives. They will cherish each other and create a wonderful environment in which to raise their children.
(From Rabbi Pliskin's book "Marriage", Chapter One, pp.24-6)