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.
It's just yummy, and the flavor is way more intense. I brew and drink some pretty fancy coffees sometimes, but even still I don't really care about the differences between anything above mid-tier, so that's where I usually live. It's just nice to have something to sip on that hurts ya back, ya know?
Though admittedly, I'll sometimes go for a brown sugar shaken espresso monstrosity, but those are on pretty rare occasions, and usually when I'm already making one for my spouse anyways.