At one point, if asked, I would have said that I wasn’t much of a shounen fan (the action series type that tend to get long anime adaptations).
I didn’t get into anime until I was well past the targeted age group, and, of the major long-running shounen anime series the only one I liked was Bleach and only until I realized the author had no clue how to tell a good story. Obviously, there were shounen series I liked but I figured they were the aberrations. Then Hunter x Hunter came along and provided a most compelling argument as to why I was wrong about shounen series (as well as the perceived weakness of longer series).
Though my feelings towards shounen series thawed, Hunter x Hunter provided an unreachable mark that no shounen series could approach, much less, equal or best. Actually, I’m not sure if I’ll ever see another anime, of any genre or demographic, that will raise the bar any higher than Hunter x Hunter, but, 2016 finally saw the conclusion of a shounen series that is a true worthy shounen follow-up to Hunter x Hunter. That show is Ushio and Tora.