When using common sense chances are you're more likely to pair with someone whom you share common attitudes, beliefs and values with because, the greater the similarity the safer you stand. "Smart birds flock together, so do rich birds, pretty birds etc" ..... But if you think about it does similarity lead to liking the individual or liking the individual lead to similarity?
Oposite attract with great power jst like magnets and it has an adrenaline to it because, of the risks/challenges involved for i.e. in a typical scenario the good girl with the bad guy or somali scenario opposite qabils..

Ps; Im not talking about interacial stuff so

My question 2 you; similarity or complementarity and your reasons?