I am not an avid watcher of TV (except sport) but I recently had to take 6 months off.
I had heard so much of this Game of Thrones so to relieve the boredom I obtained the first 3 series. (legally of course - cough).
I have to say I was completely hooked and have now watched all 4 series and thoroughly enjoyed every minute.
Another positive note is my wife has just started to watch it and is so engrossed she is forgetting to give me my orders. LOL