If the animation style isn't your favorite, then whatever, not everyone likes that kind of thing, but the story is fantastic. Good plot, great buildup, pacing, and a couple really good twists throughout the show.
I've watched KLK 4 times now and not once do I think "ugh, got to make it through this episode". On the other hand, other animes that are universally accepted as great always have one or two of those for me. Like Cowboy Bebop, that's a great show, but I still have to grind through the episode when they're chasing that little boy that's 80 years old, or the one with the space trucker that looks like a dude.