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.
I have experimented with sugar, cream (dairy, soy, almond, coconut, oatmilk), and both combined, but I return to black and have stayed this way for years now. Sugar hurts my teeth, and I am not realy interested in adding calorie dense stuff to my happy juice. And I love the taste of black coffee. It can be shit sometimes, but at it's best it surpasses anything sweeteners or cream can add.