Found Adventure Time with Finn and Jake on Netflix about a year ago. I loved it and watched everything there was, which was about 3 seasons. And then... I found another 7 or so seasons on HBO a couple of weeks ago. So yeah, joy! I'm currently watching that a lot. It's so weird and imaginative. Also watching Trollhunter and Three below: Tales of Arcadia (both by Guillermo Del Toro, he makes interesting stuff) on Netflix.
I have yet to watch The Witcher and season 3 of Stranger Things, but I'm definitely going to watch those as well.