I dont have many favorite series...
That's my list:
Top 4
1. Scrubs

2. Breaking Bad

3. Vikings

4. The Walking Dead (but I only watched the seasons 1-4)
Some other great series:
- Two and a half men (only the seasons with Charlie Sheen)
- The Big Bang Theory
- Family Guy
- Attacks of Titans (Anime series)
Few weeks ago I started watching Broadchurch, however I still have to watch the two last episodes of Season 1
And I started watching Better call Saul (the spin-off of Breaking Bad) but I lost my motivation after 2 episodes
I admit I never watched GoT. Now I've said it
Probably I will like it, the topic and the plot seems interesting to me... however, there were so many quality series in the last few years that I never started watching it. There are also series like for example Dexter which I still gotta watch one day