Does your partner have to share your life interests?

For any of you who have a career or a hobby that you are passionately interested in, and will be involved in for the rest of your life, how much would your partner have to care about /support your interests for you to feel okay about it?

Would they have to participate? Would they have to talk with you about it? Would it be enough if they made an effort to be interested in it, or even just pretended to be? Would it ever be a dealbreaker?

Thanks.