Cliché Storm: The movie plays like your typical horror-themed arcade game. Two players with loads of guns and ammo, blasting monsters (witches) into ludicrous gibs, saving the hostage villagers (children), along with a Big Bad final boss. And the adventure continues. It also helps that the heroes struggle against powerful witches, much like how a stage boss takes a lot of punishment before getting destroyed.
Complete Monster: Muriel the Grand Black Witch is the leader of the Black Witches and the vilest one in existence. She orchestrated the deaths of Hansel and Gretel's parents (the mother was a Grand White Witch), as part of a plot to use Gretel in a Human Sacrifice to make witches impervious to fire. Years later she and her Co-Dragons kidnap twelve children to use in the sacrifice, after already boiling one down for a magic brew. Muriel kills anyone who attempts to rescue the children, putting a curse on one tracker that forces him to eat maggots before exploding upon returning to Augsburg. When one witch is captured, Muriel sets part of the town on fire as a distraction, and forces a guard to shoot himself with his own gun. She later kidnaps Gretel to cut out her heart as part of the new sacrifice. When this fails, she takes Hansel and Gretel back to the Gingerbread House where they killed their first witch, before she murders the good witch Mina, whom Hansel fell in love with.
Draco in Leather Pants: The witches, particularly Muriel and her two crones (Horned Witch and Red-Haired Witch).
Evil Is Sexy: Muriel, when not in her witch face at least. Given that she's played by Famke Janssen this shouldn't be surprising.
Germans Love David Hasselhoff: The movie was hated and bombed in the US. However, it was a hit in Russia and Germany surprisingly and had a sequel greenlit thanks to worldwide gross.
Idiot Plot: The witches' plan to become immune to fire would not make them invincible, just remove a quite frankly rarely used way to kill them seeing as throughout the movie only two witches we see are actually killed by fire (one is the siblings mother, who did so willingly). We are given no real reason why taking away this one thing would help.
Though if the fire that flares up in the bottle Mina uses for her spell is any indication, it was a sort of fire spell which would mean if they had been immune no witch at the ritual would have died.
Incest Yay Shipping: Most fans of Tumblr and Deviant Art have paired Hansel and Gretel together. The short-"haired" witch the siblings capture briefly taunts them with saying they should do this. Neither of them is pleased.
Muriel setting Hansel and Gretel's mother and father to be burnt at the stake and be hanged respectively, despite being completely innocent, especially since the former is a white, and therefore benign witch; in order to separate Gretel from them in order to get her heart.
Berringer crosses it when he murders the mayor in front of the townspeople.
Ugly Cute: Edward the troll. He might look threatening, but his puppy-dog eyes are adorable.
Visual Effects of Awesome: The film employs a combination of digital and makeup effects to bring the witches to life. Edward is a completely practical creation.
What The Hell, Casting Agency?: Hansel and Gretel look to have only a couple of years' difference between them as children. Flashforward and... well, Jeremy Renner is 15 years older than Gemma Arterton and looks it.
More importantly, this is a completely non-serious movie with shotguns, hideous witches, and ridiculous amounts of blood and gibs. Why didn't anyone get Bruce Campbell for this film?
They missed an opportunity to show Sheriff Berringer being present at the burning of Adrianna.