The main answer to this question is that no one is actually 100% ready to accommodate someone else especially if it's forever. Well if it were possible, I for 1 will not accommodate anyone. This is because no one can be like me, there is only one me in this world and that's how it will forever be. But if everyone reasons like that, then I don't know the world will be.
The fact there is that your partner isn't perfect so are you. He might hate a specific or some characters in you and you also might dislike some characters in him. But the word LOVE has some many reasons but in this case, it means I know you ain't perfect but I want to be with you and you imperfections.
So that's it, you can only agree to live with your partner if you are willing to accommodate his/her imperfections.