I like giving blood. Which sounds weird. But it makes me feel like I’m doing something good, and it doesn’t take that much time. I think it’s worth a try. I have passed out once, but it was my fault- I hadn’t eaten a substantial breakfast and I didnt have a cookie/juice after. It was right in front of the student union, aka everybody at the whole school, and it was really embarassing. but besides that, I’d say its worth it.