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.
It helps that the series has excellent music as well, and that while YMMV on the games themselves, the story in all of the games is excellently done and so off the norm that its hard to ignore it.
Values Dissonance: Not really values so much as game styles, but the Drakengard series places a emphasis on story, setting, and characters more so then anything else which makes it less popular in the West due to the west being focused more on gameplay and graphics.
Vindicated by History: Sure the first game did not have the best budget and gameplay, but for a game of its time, it was unique and rare. Because it was so different, did not have the high end graphics, or amazing gameplay of other RPG's at the time, it was largely pushed aside. That is, until a few years later.
Hell Is That Noise: The soundtrack for the original Drakengard is pretty good at sounding both exciting and terribly bleak. As the end of the world approaches and things become increasingly weirder and weirder, the soundtrack becomes highly discordant and sounds just as insane as the actual events occurring around it.
Furiae's scream as she climbs out of the Seed of Resurrection.
Narm: The voice-acting from the first game is laughably bad. Chief among them is Manah, whose VA when she is possessed sounds completely bored out of his mind, making what could have been an unsettling character into a hilarious joke.
Nightmare Fuel: Giant babies that eat people take over the world. Scarier Than It Sounds.
Special mention must also go to the soundtrack. Never has remixed classical music been so terrifying.
Furiae in Ending 2 when she's "reborn." In the words of The Dark Id: "SWEET ZOMBIE JESUS FUCKING H. CHRIST!!!"
The Scrappy: Verdelet is greatly disliked by many players due to the fact that he is worse than useless and will not shut up. It's not even in a Stop Helping Me! sense; he's just constantly whining about the seals being broken. (Although granted, what they were holding back may be worth whining about.) These fans were delighted to find out that Verdelet had died sometime in between the two games, and if they leveled up a certain weapon all the way and read its history, were even more delighted to find out that Caim killed him.
Leonard's pact-partner, the faerie, is the only pact partner besides main character Angelus on the Characters page, but for all the wrong reasons, as you can go see.
Scrappy Mechanic: For all that the plot is incredible, the controls for any and all aerial levels will make you want to break down crying — for some people. Those with superhuman reflexes or simply an uncanny ability to hit things in the right place may find it the most enjoyable part of the game. Flying on the dragon during field levels, on the other hand, requires a dizzying amount of backtracking and circling.
What an Idiot: Manah, full stop. What the hell did she expect would happen by removing the seals?
For the second game
Contested Sequel: Drakengard 2 was not directed by Yoko Taro, and it shows, though the improved gameplay and lighter story save it for others who felt the first game bringing on Darkness-Induced Audience Apathy. Nier, however, is, leading some to call it the true sequel to Drakengard.
Die for Our Ship: Nowe/Manah fans vs. Nowe/Eris fans. It's actually quite surprising how sharp the divide is here. Possibly the reason why the first game's only love stories were either about obsession or incest.
Ensemble Darkhorse: Urick, from the sequel. We don't know why we love him; maybe it's his charming accent, way with words, his beee-utiful hair... or perhaps it's just how awesome he is on a battlefield with that axe.
Goddamned Bats: The second game's air-stage only enemy Griffins. It takes a long time to kill them and they're hard to ignore, as they're one of the few melee enemies encountered in the air.
Hell Is That Noise: The grinding of rending metal and the cracking of glass, as reality is thrown into chaos after the final seal breaks in Drakengard 2.
Ho Yay: The game features what is probably the world's gayest boss fight outside of the Boys Love. Literally. The boss makes a pass at both male party members at least once.
Idiot Plot: Various plot points in Drakengard 2 seem to only happen because the characters do things that make little sense.
Moral Event Horizon: You'll be calling for Gismor's blood when you see him use Eris as a human shield and force Nowe to run her through.
Replacement Scrappy: Nowe for Caim Even most of Nowe's fans feel replacing Caim with him was a bad idea. Like most things in Drakengard, Caim turned most of the standard video game protagonist tropes on their head. His Axe Crazy, almost heartless nature deconstructs and satirizes most player's tendencies to just grind levels in RPGs by mindlessly killing enemies and how players often overlook some morally ambiguous things they do. Nowe, on the other hand, is just a standard JRPG protagonist and is really out of place in the crapsack nature of the world, Lighter and Softer sequel notwithstanding.
That One Boss: Yaha and his gnomes. When they aren't a whole lot of noisy gnomes attacking Nowe en masse, the floor randomly lights up with circles that produce highly damaging stalagmites. And once that's over, there's the giant gnome/rock monster thing itself... with a tendency for overly powerful attacks, including one that is nearly impossible to dodge. Rinse and repeat until you kill it. Ugh.
Gismor also qualifies. Instead of staying within weapon-range like a nice evil entity, he either jumps around the four platforms that you cannot reach because they are about three feet away from the edges of the cross-shaped walkway that you can stay on, even though your party members can jump about twice their height, or stands at one of the four arms of the walkway and shoots lasers at you that you have to move in a specific pattern to avoid being killed by. While on the platforms, he fires magical energy balls at you that, if you manage to break them, give you a magical boost, but are about as easy to hit as Fire Keese. And you need magic, because you have to hit him with magic to get him to move to the walkway