Nature or Nurture

I’m a fairly moody person. Having my daughter has made me slightly less morose, but I am still prone to bouts of depression and had a massive breakdown several years ago. I think it’s safe to say most people in my family are fairly moody and miserable at times. The person we refer to as “the sperm donor” is a sociopath, so I’m fairly sure my daughter has not inherited her sunny disposition from that side either.

So then is it nurture?