Donating marrow is very painful but it's definitely going to an even sicker person than a blood recipient. Well, usually. But it hurts like hell but they pay well so I guess there's a bright side to it.
Pretty sure I'll be drawing blood from patients soon and I feel pretty good about it (referring to Rukas's fear of needles) whereas if you asked me two or three years ago, it was one of the more daunting things, I felt, about being a physician.
My dad had to give me a TB test and get some routine blood work done this past summer. He's been doing it a while, but I'm pretty sure he could have done it with his eyes closed. Where most doctors have the nurses do it, he usually does it himself to patients if he has the time. I went from being scared of needles, to simply afraid of sticking someone with one, to eventually wanting to be able to do that shit routine.