Hopefully, @
Olimpia will see this and reply, but if she doesn't, you can read her answer in her post that you quoted above. You might initially be attracted to someone who has similarities to you, but you can stay longer with someone who can better help you in your weak areas.
This is the basic reason I'm not jumping on my EII secretary, even though she's sent me an invitation. Long experience has shown me that she and I can't motivate each other. On the other hand, my experience with my Duals (only males at work, so far), has shown me that we definitely not only can motivate each other, but we can easily and naturally cover each other's weaknesses.