1. Band of Brothers
2. Breaking Bad
3. Game of Thrones
4. Friends
5. Star Trek: The Next Generation
It's funny that my top 3 is also IMDb's top 3. After Breaking Bad however, I really don't feel the need to watch more series. I was very much a series-watcher, but BB was so brilliant that it's made newer series lose their appeal to me. I guess that's the greatest compliment one could ever give.