These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Fan Nickname: The series itself has been referred to as K-On! season 2 or Military K-On due to the similar art style and the fact they're both about anime girls playing instruments. Also called /k/-On from time to time (/k/ being 4chan's Weapons board). And War-On, and probably a whole host of other, similar names. Sadly, no one seems to be going for Guns-On...
Starting in episode 5, Kanata and Noël get in on the hand-holding as well.
Filicia has an interesting way of testing people's language skills:
You have really nice breasts, don't you? I'm rather fond of them. I wonder if it would be alright if I play with them for a bit? Would it be alright if I played with your entire body? —Just as I thought, you don't speak any Helvetian.
Earlier in the same episode, Noël stops A’isha from trying to attack her by groping her bare breast.
After the Grand Finale, Noël/A’isha is widely considered all but canon.
Nightmare Fuel: The corpse of the nameless soldier in episode 7. Especially when he grins, telling Felicia to commit suicide. Even worse is that it's all Felicia's hallucination, so really, she nearly talks herself into dying.
Others got tainted by the credits roll. A series by the guy who directed Elfen Lied and written by the author of MAI-HIME suggested a certain artisticdirection, and were dissapointed when it turned out they were only right about the Break the Cutie part.