Brown Sugar is undoubtedly the best. When I think of Pop Tart, that is the flavor that comes to mind. It actually was so good that it bummed me out when mom would buy Smores over it.
That being said, Cherry is not too bad, but definitely not a top tier. Wild Berry is good. I actually prefer Blueberry if we are talking about the more fruity flavors.
Chocolate Fudge flavor is pretty underrated in hindsight.