My mom always took her coffee black, so did my grandma, so I think it imparted onto me. For me I like the bitterness, when I take a sip of my morning coffee and it hits there's nothing like it.
Over the years I've tried to get into sugared coffees and I still keep coming back to black. Although every now and then iced coffee with creamer and sugar is a good treat.
One day, many years ago, I thought to myself "Hmm, if I'm going to become an adult soon, I aught to acclimate myself to the taste of black coffee" and I did. Many years later and cream and sugar taste off to me. Flavored coffee (as long as its whole bean, grinding my own has been a gamechanger!) and unsweetened flavors are a special treat every once in a while.