Kim Kardashian thinks similarities are "essential" in relationships.

The reality TV star loves the fact she and boyfriend Kanye West have a shared passion for fashion because it means they can have "in-depth" discussions about their careers, and she thinks common interests will be increasingly more important as they get older.

She explained: "If I have a design meeting, or he has one, we come back and talk about how our meetings went. It's cool, because you can definitely get more in-depth with someone who actually knows what you're talking about ... So that's been a fun similarity we have. I think it's essential to have similarities.

"When this whole life is done, and it's just the two of us sitting somewhere when we're 80, you want to have things to talk about that you have in common. I think that's something maybe I didn't value as highly as a quality I cared about in someone."

Despite her high-profile, Kim insists her goals don't centre around fame, but she is focused on building and bettering her business empire.

She added in an interview with New York magazine: "I don't really have goals as far as, I want to be on a cover or something like that.

"I think my goals are more just expanding my line, and having my line be really successful. That's the ultimate goal, I think, for me.

"I don't say, 'Oh, I want to be on this magazine or I want to do this.' It's all fun. And I love, definitely, turning into a different character. I think each shoot has a different personality."