I donate regularly. I try to go every 8-10 weeks. Sometimes I am deferred for low hemoglobin, but if I remember to load up on iron rich foods in the week before I go I am OK. I have also been deferred for: an irregular heartbeat (side effect of medication I didn't notice I was having until they felt the skipped beats), recent vaccination post human bite (that was a 1 year deferral, although they don't routinely ask about humn bites), and because I have dated men who have sex with men. The American Red Cross changed the guidelines so that a woman who has had sex with a MSM can doate after 1 year. This is the one that annoys me the most, as I know what my safer sex practices are, the frequency with which I have STD testing, and the recent STD results of a partner. I was a person who donated before I ever became a nurse, so I know that being a nurse didn't contribute to my donating blood, although my comfort with donating blood may have had something to do with the personality traits that also led me into nursing.