You must love your curls if you want them to look good. Treating them roughly can damage them permanently. And once they get damaged, it can be extremely difficult to restore them.
If you want your locks to bounce and to shine, it is important that you take dedicated care of it. Every person will have his or her own hairstyle. Some like curls, whereas some like straight hair.
It is advisable that you be happy with the natural style and look that you are comfortable with. If you have curly hair, try not to beat it straight and vice versa. Either way, your hair will be exposed to a lot of chemicals and heat, which is harmful for them.
Nowadays, there are lot of hair ointments and sprays available to add glow to your hair. There are gels that help you style your locks. But make sure you do not overuse it. Your cuticles are bound to get affected.
Coloring your hair can make you look cool. But consider the damage that a substandard material can cause to your hair. It is best to be happy with what nature has given you. Take care of it instead of trying to change it dramatically.