Relationships, personalities better to be different or the same?

I just heard that sometimes opposites work better sometimes than people who are the same. Just wondering, and confused.Relationships, personalities better to be different or the same?
I thought same personalities works best because they both understand each others needs.Understanding is the ultimate keystone of a relationship.For when you understand each other you will truly love and care for each other because you understand each other,because you see each other to one another as if both of you is seeing one self to one another as if you are really ONE FLESH AND UNITED AND ONE BEING.Is not it,the purpose of marriage is UNION OR BOTH OF YOU BECOME ONE FLESH?OR ONE BEING?





Why seek a person who do not Understand you?!!!! Are you crazy then?





You know the major reasons for break-ups is MISUNDERSTANDING!..they do not understand each other so they end up in disaster: hurting one another,slandering one another,become bitter,etc....





You know WITHOUT UNDERSTANDING THERE IS NO LOVE! BUT WHEN THERE IS UNDERSTANDING THERE IS LOVE AND TRUST AND FAITH.





BUT IF YOU DO NOT UNDERSTAND ONE ANOTHER...oh...a disaster in the making..!





Have you heard the term ';irreconcilable differences'; in almost opposite relationship when they reason out for their break -ups?





Why look for someone who could not understand you?are you nuts?


Anyone of us does not want to live or have a relationship with a stranger,don't you?