I have wavy hair, what shampoo and conditioner is good for me ? and how often to you change shampoos ?

I have thick wavy hair, and I like using Dove, Sunsilk, Herbal essences, and Aussie. I change my shampoo every time I empty a bottle.I have wavy hair, what shampoo and conditioner is good for me ? and how often to you change shampoos ?
go with one you like. epending on what you want your hair to be like is how you should choose your shampoo. you can stick wit that same shampoo for years unless you yourself discover it's wrecking your hair. go to any drugstore and look at the varieties.