I'm not sure what it is about a certain shampoo commercial that will grab my attention and make me buy their product but I do keep my eyes peeled when I'm running out of shampoo and/or conditioner and... Probably ultimately just see the same shiny hair you get on all of them on any one particular commercial at the right time and I'm sold. My last pick was L'Oréal's new haircare line of products called "Advanced Haircare" which are tailored to individual hair needs.
These ones I tried out were not for the same problem: the shampoo is the oleo-keratin variety for frizzy hair and the conditioner is the arginine one for fragile, falling hair. I tend to mix up my conditioners and shampoos all the time because I get the best results that way but I was still very conscious of the immediate after-effects of these ones.