Reply To: There are 8 different blood types in the world. Which one are you? Activity › Forums › General Discussion › There are 8 different blood types in the world. Which one are you? › Reply To: There are 8 different blood types in the world. Which one are you? July 28, 2014 at 5:01 am #6648 Kimberly BrownParticipant It is a small portion. My husband is o negative as well. He claims he is special all of the time. 🙂