What type of personality traits are associated with ABO blood groups?

There are none. Blood groups have no relationship to personality, any more than one's zodiac sign actually does. During the 1990's, a single crook wrote a series of books claiming that blood group impacted general health, personality, best diet and so forth. It was totally made up. I'm sorry this came up.
ABO blood groups. Although there are books which describe specific personality traits and dietary needs of those with different blood types, this is not a well-researched topic and those that claim otherwise are subject to being accused of quackery.