This post should be a sticky, since this question comes up over and over again, and the answer is always the same.
To the OP, no offense to you, but this question comes up a LOT.
"The challenge is to be yourself in a world that is trying to make you like everybody else."
"...rationality is not necessary to sell things.."
My staples: Mane n Tail (cowash), Garnier Fructis Sleek n Shine (leave in condish), Grapeseed oil or shea butter (sealing), Organic Root Stimulator Elasticitea (leave-in condish & light hold)