Here's the funny thing about content being "great" - it's a matter of opinion. I (personally) wouldn't put the Americans in my top 10 shows, or maybe even top 20, and at least 5 of those are from HBO. As opposed to Breaking Bad, which would be in my top 3 along with The Wire and something else which changes depending on the week and my mood.

Agreed the GoT is a lot of fun but not particularly "great" in the same way as others of these...