Dad failed when Saki asked him what he disliked about his wife.
You never EVER say that you dislike something about your spouse, because if you do, you will start thinking about them in a negative way.
Instead, reframe the annoying things about your spouse into neutral terms. Like if your spouse is messy:
My wife is a perfectionist, so when she cleans, she does a super thorough job. But that also means that cleaning is a very time consuming chore, which she often puts off until she has time, so junk accumulates.
Fortunately, I prefer to clean a little at a time, so I just 'spot clean' the house, a little at a time. And between the two of us, we keep the mess in check.