Quick question.
Two of the same type pairing up, wouldn't that be too easy in a relationship.
I know when you first meet someone you wouldn't be able to type them immediately so you may just have that 'click'.
In this case though, i am going to dare to assume, you would know exactly what and how the other is thinking/feeling etc. Would that not take some of the fun, excitement, finding their quirks and flaws as you would kind of know who/where they are as you are so similar.
Also how would you grow as an individual if you are with someone so similar, the boundaries are all in place, so how would you learn to think from another perspective, ie your partners, when that perspective technically thinks like you?
Just an idea.