The most popular blood types at blood donation stations: Type O blood Type O blood is one of the most popular blood types. Type O blood is the most common blood type and one of the easiest blood types to donate. This is because type O blood can be used for all other types of blood transfusions, a very valuable property and anyone can receive type O blood. Therefore, when there is an emergency, having a supplier of type O blood may save many lives. In addition, people with type O blood are more likely to donate blood because they have no A, B, or AB antigens. So, if a person has type O blood, he does not have to worry about his blood causing problems in the receiver.