I'm gonna suggest Hunter x Hunter. It is among the only shounen anime's I ever suggest to people. It would be in the same category as things like Dragon Ball Z, Naruto, etc. Now this would immediately turn anyone away. It turned me away at first as well because in many instances it's like others in its category, BUT I firmly believe that Hunter X Hunter after the first season is exactly what shounen anime/manga should have been. It's a super long series though, not something you watch in your spare time. This is honestly an off-hand suggestion that I recommend to people, but they rarely ever get to it. Mostly because the first season is a snooze fest, but after it the entire anime as a whole takes on new life. It touches numerous genre's within anime as a whole, but it does them well.