Should you use one skin care brand or a mix?

It's not uncommon for bathroom shelves to be full of half used products, mixed and matched from a variety of brands.  After all, the temptation of that new scrub, serum or peel that promises to transform our complexion can be exactly that ... tempting, to say the least. And so it goes, each season a shiny new product grabs our attention and we begin to accumulate a very expensively curated and confusing skin care selection. But is this the best way to go, for our skin?