For us, it's potato chips. I just don't like the taste of store brand ones.
What are some foods for you that you have to buy name brands?
Miracle Whip, Kraft Mayo (we tried Smart Balance Mayo - talk about yuck!), Oreo's - Tried the store brand, they were okay, but just not like the real thing.
I actually like store brand potato chips, I like the ones that are slightly burnt, and you seem to get more of those in the store brand. I also like store brand cheese puffs. Oh and I prefer the Malt-o-meal Cocoa Roo's over the Cocoa Puffs name brand.
Hot dogs have to be something like Franks, Hebrew Nation, Red Hots, etc. Can stand the kind of hot dog that is just bologna in another form.
Hellman's mayo. I will use others if the price difference is a lot, but definitely prefer Hellmans.
I am sure there are other items too, but these are the ones that come mind.