I grew up with loving parents and siblings, we're still a strong coherent family unit.

Unhealthy competitiveness, inability to be happy with what one currently has, don't believe in ... starting [a] family, these things all apply to me.

My parents will celebrate their 50th wedding anniversary next year. I distinctly recall my mother describing my father as her best friend about a decade ago when on the phone to one of her friends.

Suffice to say, I disagree with your theory of tell tale signs. You've just put people in a box incorrectly.