In Japan, belief in blood group personality types colors dating
                                
                                
                                    (Newser) -
                                    If you're looking for a decisive, confident partner, try dating someone with type O blood. Type As are dependable worrywarts, ABs are balanced but high-maintenance, and if you've been burned by a selfish ex, blame their type B blood. That's the conventional wisdom in Japan, where people believe blood group...