Ninjago is LEGO's longest runnning orginal theme and is my favorite LEGO theme. This is thanks in part to the show that goes hand in hand with the sets. The show is probably my favorite show as of now. I like a lot of the seasons from the show and have plenty of Ninjago sets. The show is techniaclly two shows as the show had a soft reboot after season 15. Ninjago: Masters of Spinjiztu/LEGO Ninjago and Ninjago Dragons Rising.