I am finally dwindling mine down, I have more conditioners in the shower now than shampoos because they always out last the shampoo. For years now, I have loved using Wen, but like to have a traditional shampoo/conditioner on hand too. Let's see I have 5 varieties of Fekkai shampoo/conditioner (some just the conditioner now), 1 Redken set, and 1 bottle of Wen, with backup in the closet of 2 bottles of Wen and a Fekkai Glossing shampoo/conditioner.
My goal is to get down to Wen only and 1 or 2 sets of other. For some reason it starts to bother me when I have so many quarter full bottles of stuff.
ETA: Don't get me started on styling products, that's an endless black hole!