My favorite are the staple items like milk, bread, fruit, granola bars, chips, etc. It really helps me in the long run when we have some brand preferences. We still get cash back for what we buy.
I love the staple any items....things like bread, milk, eggs etc. I think they should always be available and then have special items like pretzels, chips, meat at a higher rebate amount every once in a while.
$ on any receipt and staples like milk.
Milk!
Any of the household staples(milk,eggs,bread, laundry,paper goods)..also items that go along with the holidays so like with Halloween any of the candy bags