I did a month of inpatient renal in med school and we saw a ton of transplant patients. And one thing that was obvious was that people who got kidneys from living relatives always did much better than those who got them from cadavers.
We saw a few patients who got kidneys from their kids, and I have to say, I always deeply disapproved of that. Giving up a kidney is not without its significant risks, and I'd rather be on dialysis or even die than ever allow my kids to risk their health for me. I feel like that's the natural order of things.