Samurai Jack was one of the last great action shows of Western Animation, with an art style that was unheard of at the time of release. When Samurai Jack first came out, thick line animation was the regular; Samurai Jack not only pioneered thin line animation, the show helped popularize it. Regular Show is good, yeah, but in the grand scheme of revolutionary cartoons to come out of Cartoon Network, it's simply above average. I can rank it #11, MAYBE #10 if Steven Universe didn't have such good music.