Even identical twins, who were living as two embryos in their mother's womb, do not have all the things in common. So, I think both similarities and differences are needed between mates in a real meaningful relationship to let it be directed and built in an appropriate way, which lead them to achieve their common & personal goals. " It Always Takes TWO To Tango ".......
As I am a bit introverted, I prefer a mate with same nature. Someone who is calm, well-mannered, virile, mature, wise, industrious and also uxorious & independent.......
I am neither optimistic nor pessimistic BUT Realistic;so, being maturely realistic is important for me. It is really great and positively constructed to be able to see both sides of any conditions, and then keep everything in moderate & balance.........
Commitment, loyalty, honesty, generosity and a sense of being real friends are the most significant criteria for an everlasting happy tie & life ... I think lack of any of them can be the beginning of the end... " Let's treat others as we would like to be treated "........
However, all these are sine qua none but not per se adequate as a guarantee