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'll take it black when I absolutely need an immediate shock to the system. Black coffee helped me write some of my best English 100 essays; especially after one of them saw LibreOffice throw an unexpected crash and lose me eight pages worth of draft work. (That one's 98% on me, though. I was slipping on my ctrl-s frequency that day and I paid for it.)