None. Your SO is a person not an animal, all evidence to the contrary. My Dad, not usually one of the wittiest (or sexist) men in the world, says that the first three steps of the wedding ceremony for the woman are "Aisle, Altar, Hymn."

Training your SO is something that rarely works out well. Sure, little things, like taking his boots off before he comes in, putting the toilet seat down, not drinking straight from the carton, buying her own razors rather than using his: can all be trained. But I don't think you are talking about the small stuff.
You simply cannot make a dog into a cat, no matter how hard you try. You just end up with a thoroughly confused and irritated dog, a headache and a lot of wasted time. So if he is that far off your ideal, cut your losses.

Or try re-examining your ideals.

"Why should I change what I want and expect?!" you shout at your screen.

Well, why should your SO?

This is one of the perennial questions we get here, and there is no one right answer. It matters not if we are talking gay, straight or complex, both members of a relationship over time change their behaviour in response to their partner and their own life experiences. That is natural and expected.
How much change depends on the characters of the people involved. Some people change almost entirely, some minimally. Both extremes are equally unhealthy, in my opinion.