Yes, I have donated many times (23.5%)
I have donated a couple of times (41.1%)
No, I have never donated blood (35.3%)
Blood donations don't take but an hour or so from your time. There is very little discomfort involved on your part, but your donation can mean a longer life to someone else.
I have in the past, and would love to do it again :)
I have organized 2 blood drives myself. Both SUPER successful. I highly recommend it.