Alrighty then. How about Magi?
Yes, I've read Magi too. Buuuuuuuuuuuuuuuut I stopped reading it after I got caught up with it several months ago. I don't really much to say, since I can't really put my finger on why I'm not crazy about it. It just didn't do all that much for me. While I have some favorite--namely Morgiana and Titus--on the whole I'm not super attached to many characters, Magi himself included. As I was reading it was interesting--if I remember right I pulled an all nighter to keep reading it--but it didn't really have many emotional high points for me. It's not that I think it's bad at all. I'm just not crazy about it like a whole lot of people are.
I feel the same way about other series too--that they're interesting and worth the read, but not particularly outstanding in a way that makes me a dedicated fan to them. Tokyo Ghoul, Magi, Toriko, Index and Railgun, YuYu Hakasho, SnK, Assassination Classroom, The Seven Deadly Sins, Air Gear, Hitman Reborn!, Fairy Tail... those are just a handful of the shonen series I've read whose popularity I can understand and enjoyed reading myself, but wasn't effected or attached enough to them for them to earn any particularly special place in my heart (and yes, I'm aware not all of those are shonen).
One Piece, FMA, Soul Eater, Trigun, Claymore, Full Metal Panic, Inuyasha, MxO, Beelzebub, Berserk, The Breaker, Onepunch-Man. Those are a few of the series that I am much more attached to, whether for being outstanding comedies (like OPM and Beelzebub), for hitting me really hard emotionally (like One Piece and Claymore), for having lots of characters that I am deeply fond of (like One Piece and Soul Eater), for having a great plot and character development (like Berserk), or for having relationships that I love in them (like FMP and Inuyasha).
There are a lot more series that I love than that, but I tried to stick to general Shonen stuff. And I'm not saying that the 2nd group of series I described are definitely better than the first group--just that personally, it's those second ones that have made a bigger impact on me.