If your aikido obsession encroaches a lot into your everyday life like mine does, it can be a great benefit to have an aikidoka as a partner. I've dated two aikidoka and it's feels 'right' for my partner to share this big part of my life, but I will admit, when things go sour, it is very, very difficult to not let it affect your training. But not impossible. Also, I know a husband-and-wife couple who train together and on the mat, you' wouldn't know they were married at all so it effects no one. So yeah, why not?!