What is or was you're favorite store bought cookies?.... Ever.

Rippin' Good Macaroon Cookies. Nothing compares to them, for me, at least—great flavor and texture. I even tried to make a copycat recipe, but to no avail.
Unfortunately, they went the way of the Dodo bird, at least for now.
Ralcorp Holdings bought Ripon Foods in 1999, and then ConAgra acquired Ralcorp in 2012. It eventually permanently closed in 2016.