It is impossible for her and her partner to have only points in common. They are two different people, so they will have different opinions. There will be points of divergence. And that's totally fine. She shouldn't have the same personality. In all of this, the most important thing is to respect each other's hobbies and interests. You have to care at least a little bit about things that your partner cares about.
Of course, this does not mean that you also have to start with your partner's hobbies. It doesn't mean you have to pretend to be interested in the things that excite him. It doesn't mean you have to change.
It simply means you are there and listening to him. It means you don't roll your eyes when he talks about something he's passionate about. It means you don't make fun of his love for a hobby, the show he likes to watch, the songs he likes to listen to... It means you show respect for the things he likes in the same way that he respects them yours! We hope!
You should be excited when your partner is excited. You should be happy when your partner is happy. You shouldn't destroy his joy just because you don't understand it or because you're not a part of it.
When you love someone, you should listen to them when they get excited. You shouldn't just nod blankly as if what he's telling you is the last concern in the world. You shouldn't be counting down the minutes until it goes quiet. We should give him the opportunity to express himself, to be happy, to boast...
If your partner is passionate about a project, you should support it. We should encourage him, encourage him. You should motivate him when he wants to give up. You should make him feel that you are on his side. You should remind him that you believe in him and that he can do it, even when he doubts!
When you love someone, you should respect their priorities! We should hope that he achieves his dream, hope that he enjoys it, hope that everything turns out well, for him.
When you love someone, you should care about the things that your partner cares about, even if they are not "your style". If watching a certain movie or concert would make him happy, you should join him, without complaining. You should join without constantly reminding him that he owes you a big favor. You should join without making him feel guilty because he has different interests than yours.
You should want your partner to be happy. Doing things that excite him. And you should be sure that if the roles were reversed, your partner would do the same for you! You should know that you are not the only one struggling.
He should do the same for us, because you care about each other's happiness...more than anything else in this world!