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.
When I was in the army I didn't have time to add milk/sugar, nor did I want to use old warm milk from my pocket.
Now I'm a coffee snob and can't drink coffee anywhere but at home.... It's all too weak and watery....