My father and my younger brother. Just thinking about them gets me wound up so tight.
My old GP actually suggested dad was most likely a sociopath or narcissist after having to deal with 6 members of my family whose immediate problems stemmed from him.
Thankfully I haven't seen or spoken to my father for over 7 years however younger brother keeps giving him my new addresses and phone numbers (i know its him as out of all of us he's the only one who still talks to him)
So he still sends me birthday and Christmas cards. I have no idea how to describe what I feel when i get a card with his handwriting.