I wish I could donate a kidney, but my doc would never clear me because of hypertension. I think it would make me feel like I did something really important in life. What could be more important than saving another life? I think it would be an automatic ticket to Olam Habah.
Anuran- Generally, if kidneys go, they tend to fail together. Studies have shown that people who donate kidneys have as long a life expectancy as anyone else.
Anyone who is able to, should do so. There is a major shortage and people die every day waiting for kidneys.