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.
Fridge Logic: Oh so much. One of the most shining examples from the cartoon was the denouement when Maxx finds his own Outback, which is gardening in a little greenhouse. This is significant because the "animals" in Julie's Outback are all plants. This leads to several possible conclusions:
Julie helped Maxx find his own Outback.
Julie and Maxx were meant for each other and the conclusion is a tragedy.
Maxx's own Outback is the reason why he was so good at protecting her, which was why she could never grow with him around.
Hell Is That Noise: The animated series featured a flashback story from Mr. Gone's past and Julie's childhood, involving a dying bunny in a box and the scratching noises it made with its good leg.
He Panned It, Now He Sucks: Linkara got some heat for his comments on the series while reviewing the anthology one-shot Darker Image #1. He didn't even insult it - he just admitted to having no clue what was going on (and given he was reviewing a small sample of the series and apparently hadn't had much exposure to the rest...).
Misaimed Fandom: Mr. Gone is often quoted for saying "Of course I've got a problem with women. Everyone has a problem with women. Because women taunt and tease. Because they are attractive, and they punish you for being attracted," which some fans thought to be insightful and accurate. In fact, Mr. Gone is a rapist, and this attitude was intended as a representation of how a rapist thinks.
Moral Event Horizon: Though the first Story Arc (the one adapted into the TV series), did not make this explicit, Mr. Gone literally rapes several women during his villain career. A later Story Arc of the Comic Book dealt with this and his reasons for doing it in a way that transcended cliche.
Nightmare Fuel: Mr. Gone, including some of his stages of decomposition, the dark Isz, the dying rabbit under little Julie's bed that keeps scratching and scratching, a baby with his eyes removed and the sockets sewn back up, retrieving severed toes and fingers from inside the "fairies" that have eaten them.
Seasonal Rot: The comic series went downhill fast after issue 21. Mr. Gone's Character Development was perhaps the only good thing to come of it. Others will argue it happened after issue 29, where the plot lost its direction and was constantly interrupted by various one-shot stories that had nothing to do with anything.