I have only one experience, and it was bittersweet.
The sweet part...well, he insisted I travelled to him wearing my wife's panties for a start. I'm not a CD and didnt want to, but felt compelled and although was odd (thong in my ass, lace brushing my cock, feeling like everyone could tell...especially the hot girls) I arrived really hot and flustered. And it instantly set the dynamic, as I was like a bitch on heat and he knew it.
He was very, very hung. Extremely thick but long too, and I loved sucking him. I honestly could have carried in for hours but he wanted my ass...
This was the more bitter part...it's maybe a stereotype of porn that black men are more aggressive, but unfortunately this guy wasnt quite as gentle as I would have needed for his size. It was great to begin with, slowly opening me up amd getting me used to his girth, but after a while of shallow, steady thrusts he went balls deep and started banging wildly amd it was too much, too soon.
The virility was amazing and I wish we'd managed longer. But i'll never forget the feelings he stirred by making me wear those panties...