I choose products that have no fragrance or colouring. These can be iritating to my scalp.
I have dry, damaged, colour treated, frizzy hair. So I like products that have lots of silicone - smooths the cuticle so the hair feels soft and looks shiny.
I started using Pantene Moisture Releases Shampoo and Conditioner about a month ago. So far they are working well and my hair looks great.