in my view, I value the basic function of marriage, a companionship throughout a life. so trying to be friends and living together harmoniously is the way out. other things seem not important.
Most Helpful Guy
My feeling is if you have someone who is always there for you and lives with you is a roommate/best friend. A marriage needs to have those things but you should to have that physical/sexual attraction.
But I will admit that the level of sexual encounters during the marriage will vary depending on the people involved. It may not be AS important to people but it's important nonetheless.1
Most Helpful Girl
For some, sex isn't important. There are asexual people that are in healthy, long-term, committed relationships... obviously minus the sex. (But that's also because their partner is either also asexual, or they are okay with their partner fulfilling that sexual desire outside of the relationship.)
For me, personally, I place equal importance on sex as I do the companionship, friendship, trust, harmonious living, etc.1