I usually don't get hung up on labels, designer or otherwise. Usually, the store brand or an off-brand is good enough for me. However, there are a few things I use both in my daily life and occasionally, where I do prefer the "brand name". Here's the list, in no particular order, as is usually the case unless otherwise noted:
1. Peter Pan peanut butter
2. Wrangler Jeans
3. Method cleaning products
4. Metromint bottled water
5. Silk soymilk
6. Meow Mix cat food*
*This is an interesting one. I won't say she prefers Meow Mix, but that's what she's been eating for so long, the cat is probably used to it. But, she eats a lot of it, so she must like it.
Two side notes:
A: Unless I'm feeling adventurous up here, I usually look for Labatt Blue, since Schlafly Beers aren't available up here.
B: I divide my shopping loyalties up here in western NY. But as far as national companies go, I prefer to shop at Home Depot, since they were good to me for 3 years.