I have curly hair and I let it be free and wild! :P. I used to hate it as a kid but then in high school I decided to go crazy and cut it. Like boy short lol. I loved it! Now it's halfway down between my shoulders and elbows. I have found that deep conditioning/ hot oil treatments 2x a month really works to keep the curls happy. Coconut oil is the best for it, but olive oil and baby oil works well too.

1. Heat roughly 3 tsp of coconut oil for 30 seconds
2. Put a decent amount of conditioner and mix it with the warm oil
3. Put it in your hair for a minimum of 2 hours, overnight is best
4. Wrap your hair in a towel or a hair shower cap thingies to keep the oil and heat in
5. Wash like normal

So far my hair has loved this routine.

I also only wash it with shampoo only 1-2 times a week, but rinse it every other day with water. This way it stays clean but has natural oil in it rather than getting stripped of it, which makes frizz.