My experience with black cock has been quite different from you all. Let me share some stories.
The first I had was a local funk musician who was married and managed a recording studio I used for a show in my early 20s. He was after me practically since we met, and one season when I couldn't afford his fee, he grabbed me by the dick and hinted that we could work out some other arrangement. This borders on something we're not allowed to talk about, but I was 21, horny, and broke. So we fucked. He topped me, and he was my first, so he wasn't gentle. Always insisted on condoms, though. I knew he was plowing others while on his tours, all women most likely, and he was trying to protect me from danger, so I forgive him that. We played a lot over a four year period until he started having trouble getting hard.
My second was a bottom, some guy who picked me up at a friend's party. He had an acorn dick, and wasn't clean AT ALL when we played. In fact, he gave me chlamydia. Was a bad fuck. I met randoms at the bathhouse in my mid 30s but they didn't make any impression. One guy I played with claimed he was a virgin, and I was his first. He didn't care for the dick, but he loved the toy I had with me. LOL
I also fucked my sling demo partner at IML 2016. He was black, but owned, and his Sir did not allow him to bareback with anyone else, so I had to respect that. He was okay. Then was porn actor Lawrence Portland that I made a couple videos with. He was a good fuck, and probably the best of them.
But the standout has to be the guy who bred me at CumUnion during IML 2019. A burly fellow took me to a fuck bench, and bred me like a madman. Putting that PreP to use, we were! LOL. When he finished breeding, I didn't even know if he had finished or just quit. I actually had to ask him directly, and he confirmed it: he nutted and he's poz. That was totally hot, but I never saw him again. Think his name was Mike.
So I never really had the "big black cock" that so many guys drool over. Most of my guys have been bottoms, and the few that were tops were not that great. It was nice to have that dark anaconda going in and out of me, but ... meh. Hasn't been ALL that special, and didn't live up to the hype.
I'm not saying that all black cock is like this. Just my experience. There must be some good ones that I just haven't had inside me yet.