The Musketeers (BBC), especially the first two seasons. It is very loosely based on the characters of Alexandre Dumas, but follows its own plot with lots of liberties both in terms of historical accuracy and in terms of character accuracy. But, and I say it as a lifelong Dumas fan, it captures the spirit of his musketeer trilogy perfectly, which is why I enjoyed it immensely, unlike many other adaptations including the latest French one.

Another great thing about the series is the ensemble cast. The characters are all well-written and it's fun to follow their individual journeys as well as the main plot. The chemistry between the four titular characters is wonderful, but all the supporting characters are great too. Interestingly, the female characters are very much present and well-developed. All in all, pure fun and feel good show, with lots of things to like about it!