Season 6 starts off meh but it does get better. I honestly stopped watching for a long time because I knew the story was supposed to only be 5 seasons long and that they just kept going because it was popular, but actually it's still quite good. The current season is very interesting, imo, and like all of the other seasons, it does build on things brought up in the past seasons. Also some awesome characters are introduced in seasons 6 and 7! Like Charlie, who shows up in 7.