Blow dryers can destroy a beautiful head of curly hair. So for curly hair, air drying may be your best bet. After you shower, squeeze out excess moisture and carefully blot your hair with a towel. Don't overdo it; if you touch your hair too much, you may break up the curls.
If you're too short on time to air dry, use a diffuser to blow dry your hair. Diffusers operate at a low speed and high heat. The diffuser will circulate the air flow while blow drying to bring out your natural curl. The important thing to remember about using a diffuser is to not stop until your hair is completely dry. It'll become frizzy and fuzzy if you stop midway.