Though it may mediocre or amateurish at first, it's not. The casting is perfect and each of them have displayed a character in a way that is very rare in contemporary television. And to consider the fact that it is the only TV show to reach a IMBD Rating of 9.5, the highest ever just adds to its legacy of perfect plot, amazing acting, conspicuous emotions and staggering twists.
I have to say after watching all 5 seasons with its epilogue movie, I am still on the lookout of a show that may break this TV colossus in terms of its 139 wins and 229 nominations.
If you are considering it, then choosing this will surely be in your short list of good ideas..