Same here. I stick with the same manufacturer [I've found L'Oreal does AMAZING things for my hair], but I keep the Really Expensive stuff [Expert Serie Vitamino Color in the giant bottles you can only get at salons], and I also keep the drugstore stuff, like the extra moisturizing and extra glossy version of the L'Oreal Vive Pro shampoo/conditioner. I've found switching it up between the two, with the Kerastase (also produced by the L'Oreal parents company) treatment in the greenish bottle weekly, leaves my hair really healthy, shiney, and happy =)

This is, of course, granted that I have very thick, very full heavy hair that you could probably use to sew with =P I tend to use heavier products because of that.