1. O: snipe at optimum machine, it is almost impossible for them, as far as possible the initiative to do, no matter who is each other, they will be in his own way of thinking.
2. Type A: lack of close to each other's courage, don't dare to close to the person you like, focused, will summon up courage to choose their own.
3. Type B: type B people are popular, so you don't have so much heart ideas on how to do, your profession or likely to be the other profession is basically half and half.
4. Type AB: type AB people thinking in this respect is quite traditional, they even with the person you like, also does not take the initiative, but rather think of the way to let the other side speak.