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.
All of the music is well-made and immersive, but nothing can beat the music that plays during the final moves of the Gobbowl game in episode 12, or the baking-tournament music in episode 8.
It's actually played with in the very last episode. The Gobbowl-epic music is played several times, but never to its conclusion, being interrupted by the action (like Nox stopping time to dodge an attack). When Yugo finally puts a Crowning Moment of Awesome, the last (epic) part of the music is played with full effect.
Fridge Horror: It's revealed that Sadlygrove's emotional state plays a hand in how he acts when fully possessed by Rubilax. That means there was a part of Sadlygrove that was totally fine with trying to kill a twelve-year-old boy who had the guts to stand up to him. Sadlygrove WAS at a pretty low, lonely moment when he was possessed...
The draconic message left by Grougaloragran to Alibert (in episodes 1 and 2) is a cryptic message from the authors, written in an imaginary alphabet. The official Wakfu art book contains a French-Draconic code-breaker. Turns out it's just a transcription of the message that Grougaloragran left for Yugo.
Every time "dragon speech" is used, it's a French sentence played backwards.
Subverted: The message etched on the wall in Ruel's cell in episode 20 is similarly written in another imaginary alphabet and turns out to be a rather crude insult directed at whoever's obsessive enough to have managed to read it.
Les Yay: Eva and Amalia; although their relationship is platonic, they did hold hands in episode 20, if you recall.
It's become a minor mutation to take the last two panels of this comic and edit it to make something referring to the season 1 finale and/or something ridiculous (as a warning, most of the edits are heavily spoilerific).
Moral Event Horizon: In season two, Quilby seemingly kills Adamai via beheading after revealing his master plan to kill everyone on the planet to rebirth their race. Then throws baby Grougaloragran into his engine of destruction for an And I Must Scream fate.
Romantic Plot Tumor: A very light example during the last half of season one, as Sadlygrove and Evangelyne's relationship begins to get hinted at more and more. It never overtakes the main plot, but their relationships with almost anyone but each other stop being explored. It can make it kind of jarring in the season finale when Yugo is spurred into an Unstoppable Rage after he feels Sadlygrove's wakfu disappear and Evangelyne has a Heroic BSOD when the Tree of Life dies, "killing" Amalia, because it's so easy to forget that they had meaningful relationships with other characters, too.
And it happens again in season two, which has several episodes focused on a fight between Sadlygrove and Evangelyne and a Love Triangle between those two and Cleo.
Toy Ship: Yugo×Amalia. All of the fishing, stargazing, playing and greeting each other first they do together doesn't help matters either. And that's before you even get into all the hugging.
Unfortunate Implications: In the special Noximilien l'horloger, the greedy moneylender has a huge nose and hair that hangs in front of his ears like peyos, painfully suggestive of an unfortunate Jewish stereotype.
The Untwist: Those who already guessed that the Masked Gobbowler is a woman by episode 10 of season 2, please raise your hands.
Visual Effects of Awesome: Hands down one of the most gorgeous-looking Flash-animated series out there, which is pretty surprising considering it's made for an MMORPG.
What an Idiot: Remington Smisse accepted a job to rob one of Bonta's wealthiest merchants of an enchanted mask, a job that would have required the use of several enchanted weapons to pull off. Grany advises against it, Remington decides to go for it anyway. He loves challenges.