I've donated regularly almost every 6 weeks for the past 32 years. I can't calculate how many gallons that is, but they greet me as Old Timer at our local blood bank. Unlike most of the rest of the country which uses the Red Cross, Puget Sound has its own blood program. Nice folks. I've worked in volunteer health capacities where I see the benefit of a steady supply of blood. Its easy enough to do, and no good reason not to for me.