my hair is mostly wavy but i also have all 3 of them... sides of my hair are very curly which is very annoying, back of my head is wavy, and on top of my hair is straight. Im one of those lucky chicks who can change hair anyway she wants to. if i want my hair to be curly i can by just using my hands to "pump" my hair while its wet... if i want it to be naturally wavy... i just leave it as it is after i shower, if i want it to be straight, i use brush again while its wet.
(once its dry.. it stays that way for most of the day.)