There are various types of doodles. Doodling is a for of expressing themselves and the doodles could be analyzed,for exeple:
Arrows: someone ambitious or agressive.
Boxes: A methodical thinker and if it's closed means that you want to be alone, if it's open means that you want escape from the situation you are living.
Dots: Symbol of auxious or worried people.
Eyes: Mean that you think someone is watching you.
Flowers: People who are romantic usually drows them.
Houses: Style house mean how you feel in your family situation.
Question marks: When someone in uncertain about his life.
Stars: (Often women) people who is very romantic.