Somat.
There are so many variables. And yes interaction is hugely important. But then sometimes genetic influence is very strong and nuture is over ridden.
Folks near me adopted a new born. A truly nice couple, kind, softly spoken they love their daughter unconditionally.
BUT as an adult she is NOTHING like them whatsoever. Loud, confident, brash and bossy. She is still loved dearly, but she undoutedly takes after in looks, manner, attitude her genetic birth family not her adopted Family.
So, is it genetics v nuture? Sometimes, yes.