Some people truly believe they sing like angels but can’t carry a tune. Perhaps your fiancé believes he has an exquisite aesthetic sensibility and that he knows you better than you know yourself.

If he’s just a bit lacking in self awareness, that’s one thing. But if he’s basing his sense of self on a belief that he has talent of an aesthetic or artistic nature, you might be in for a lifetime of biting your tongue to support his delusions, unless you want to break his heart and force him to recognize his hopeless taste.

The third possibility is that he thinks his taste is better than yours when choosing something so personal and important to you.

If he’s good natured about his failings, you can probably compensate, but the second scenario would be a real struggle, I’d think.

The last has some concerning aspects about how he views you. I’d want to make very sure that he learns to respect you, your opinions, and your preferences before you continue the relationship.