Week 10 Blood types

On November 19, today's class topic is Blood types. My blood type is A, and generally it is said that A-type are seriouse, nervous, negative, meticulous nature and so on. I think so, too. And my character comes alnost under it, too. I do not like my character much because I am not sometimes too happy to think so much. So, I have a crush on a social and optimistic person. Especialy, I get along with the person such type O. What do you think about a blood types?