I was pretty excited around the time the first chapters were released for this series. I figured that it was something I could have some fun with, but somewhere along the way, I stopped enjoying the series so much. Aside from poor-pacing and the author's habit of making some things seem so overly-dramatic, I guess the main thing that I don't like is how the story handles its supporting characters: The only two people that I see doing nearly all the work/fighting is the protagonist and the heroine, and in that regard, it seems the characters have to be either Master Class or have "language-related" powers to be of any use/pose as a very serious threat. Otherwise, they're just hanging around to make the main character look more and more like some totally awesome "bad ass" all the damn time.
http://www.mangahere.co/manga/gun_x_clover/c026/2.html
At one point, two of the supporting characters had to take on an inhumane villain. [There's their chance to prove that they're strong without the protagonist!] The bad guy turned out to be pretty strong though, the two supporting characters had realized how weak they were all along, and just when things seem "hopeless," protagonist shows up to save the day right on cue. BUT WAIT! Instead of having a serious brawl with this sadistic villain, our protagonist is thrown at the bad guy (by an additional supporting character) and knocks him out instantly for comedic purposes. What a wonderful waste of an opportunity...
[Sidenote] I wish the author could someday explain why the protagonist still looks like a young boy, yet he happens to be really really old. Like, this old:
Supporting female character: "I want your genes! That way, we could have the strongest children ever with our specialties combined!"
Protagonist: "Oh man, I remember when your Mom said the same thing to me, way before you were born."
Update (11/27/15):
So it's been over a year since I wrote this original comment/review, and I gotta admit it has improved as for giving the side characters a proper chance to do some fighting; however, it still managed to end another fight with a dumb gag once again. That doesn't hold the series down entirely, but at the rate it's been released, it gets frustrating when chapters are wasted on fights that end up that way.
And that's one of the big issues currently: The series feels like it was meant to be weekly/biweekly with the handfuls of allies and enemies and other characters all introduced at a certain point, but it's taking forever to get to them all. I think only an eighth(?) of them have been "focused on," and there'll probably be even more new faces along the way as well, so I'm concerned at how much this series will be stretched out till it's possibly axed. After all, author gave such a poor ending to his previous series (Shinigami-sama ni Saigo no Onegai o) that was axed, so I wouldn't be surprised if it happened once again with this one. Let's honestly hope not...