Yu Yu Hakusho, Kuroshistuji, Yamato Nadeshiko Shichi Henge and Junjou Romantica are my faves in Shonen anime! :anime:
.....Junjou Romantica? I distinctly recall that being a shoujo. Still. You're awesome for promoting YYH. In my opinion, YYH is the single greatest shonen anime of all time. Short fights that are to the point. An actual focus on the main characters instead of piling on dozens and dozens. An expansive episode count that isn't stupidly daunting (Naruto is 220 episodes....like, half of those are the actual plot). Oh, and ACTUAL ARCS. For me, with shonen, arcs are defined by main villains rather than the "mini-bosses", and its really annoying to see just one villain span 200+ episodes, and most shonen these days (depressingly enough) do just that.
I also like One Piece quite a bit; it's a very brilliant take on the Shounen Jump punchfest sort of comic.
Everyone seems to love One Piece. I checked out once they expected me to take a guy with a sword in his mouth serious. I just want to introduce him to Saitou so we can get rid of him once and for all.
Fullmetal Alchemist is the main official release I'm paying attention to right now.
Have you seen FMA/are you keeping up with Brotherhood?
Right now my favorite shonen series are FMA Brotherhood and Fairy Tail. One's just plain clever, and the other's everything I love about shonen series.
I really enjoy shonen, but a lot of them get bogged down with filler. I'm thinking of watching Busou Renkin and D.Gray-man to learn if they're any good.