I started donating in 1992 when my 29 year old wife had colon cancer, and our church went to Mass General to direct donate for her. She passed away in 1993, but I continue to donate in her memory- to date, 5.5 gallons. Raising 2,4,8 year old children alone did not allow me to donate as much as I wanted, but now they are adults, I donate every opportunity.