Netflix released the fourth season of Castlevania over a week ago. The anime artwork is first-rate, plus the action, dialogue and pacing are solid. A myriad of characters have individually diverse personalities, so none of them blend into each other.
I think the series' producers were not sure if another series based on a video game would gain a viable streaming audience. They made four episodes only for the first season.
Obviously, the decades old video game had a respectable core audience because the show expanded to eight episodes for season two and 10 episodes for the past two seasons. All three main characters are superbly delivered. The show has latched onto very good voice actor work, including a few 'well-known' names like Malcolm McDowell and, Bill Nighy and Matt Frewer during its run. One of the main trio, Alucard, is voiced by James Callis, who played Gaius Baltar on the SyFy network series Battlestar Galactica.
I know. Some will roll their eyes and say, "It's just a cartoon." Well, it's not. Far from it.
Edit: Warning. The show is definitely NOT for children. I should have started off with that.