I'll be the first to admit that there are certain brands that I'm not willing to forego. For example, I'm a fan of Heinz Ketchup, French's Mustard, and Hellman's/Best Foods' Mayo. However, for some products, it really doesn't matter to me or my family if we have a certain brand, or even a brand name product, at all. Go with the choice that is ON SALE and for which you HAVE A COUPON. If I'm using canned corn in a recipe, then any name will do the trick, but if we are having straight-up canned corn as a side dish (I know, so exciting and original!) then it has to be Green Giant Niblets.
So, if possible, being Brand Agnostic will save you money!