I wanted to update. I have tried all the brands of Feta cheese that I have come across. It has been a tasty journey.
My favorite, so far, has been the Boars Head brand. It seems to have more flavor than any other brand. I have noticed that some brands contain starch to prevent caking. This also makes them a little higher in calories. The Boars Head brand does not contain the starch. My least favorites have been ones that I have gotten from Walmart. They were very inexpensive, but had very little flavor. I don't even recall the brands off the top of my head.