I currently have 3 shampoos that I use in parallel, I.e. when I need a smoothing shampoo, or a moisturising one or a third gentle repair, I select from the three. Am currently tempted to open a fourth 
I have 2 conditioners: a hydrating one and a smoothing one.
How many do you have awaiting use, and do you find it an efficient method to have ones to fit your hair needs?