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.
Crazy Awesome: Urpgor at times, usually the more deranged his inventions are, the nearer they get to succeeding. On the hero side, Wildit, and on rarer occasions, Rufus, have moments of this.
Designated Hero: The civilians of the Land of Dreams are portrayed as unambiguously peaceful and heroic, however the Serious Business nature of the war and the fact the Urpneys were such meek pushovers (and thoroughly unwillingon top of it) meant it was incredibly easy for the heroes to cross the line of provocation and look more like overzealous bullies. The earliest episodes seem reliant on them being completely apathetic to the fact Urpneys are killed for failing orders, and most of the contemptuous and violent tendencies actually tend to stem more from the heroes than towards them, again primarily for trying to ruin their lovely dreams. Aside from a semi-comeuppance in "The Dream Beam Invasion", this is not once treated as overkill. The later episodes circumvent this by making the heroes more easy going, and the villains' intents far more menacing, but since the Urpneys were still as pathetic as ever, it remained a very delicate dance to ensure the Noops stayed the defending side by the end of the episode.
Designated Villain: Most of the Urpneys, but especially Frizz and Nug. The heroes generally consider them the highest form of scum, however in early episodes they were more or less established as unwilling slaves of Zordrak who got their numbers thinned out the longer he had to wait to get the stone. Even their zeal and motives come off far less petty than the heroes, with them usually falling victim to Disproportionate Retribution each episode. Later episodes made some tweaks to ease their treatment and allow the heroes to look genuinely heroic against them, but even then they're primarily sympathetic bumblers over evil in any way.
Jerkass Woobie: Urpgor is a psychotic weasel who constantly relishes in any torture Blob and his minions recieve; however, his right hand role with Zordrak only leads to him suffering even more abuse and pressure from their boss, and, despite his beliefs, is considered no less despensible than the other Urpneys because of it. Naturally whenever he tries getting the stone instead of Blob, things usually go just as well too.
Periphery Demographic: The show is fairly cutesy and childish in tone (cartoon hosting site Jaroo even lists it as a Pre School show) however it has gained more than a few older fans, largely for it's witty Urpney humor.
Rewatch Bonus: Rufus' dream sequence in the pilot episode actually alludes to some events in later episodes (the three shooting stars that the jettisoned Urpneys create in "The Daydream Bubble" along with the eventual reveal of Planet Dreamstone throughout the former and "The Dark Side").
They Wasted a Perfectly Good Character: Zordrak is a pretty intimidating and creative villain, however, he sadly only gets a handful of moments of actual involvement in the entire series, otherwise limited to cameos delivering Bad Boss banter while his Urpney mooks acted as the show's true antagonists.
Other villains such as Zarag and Urpgor's Auntie also appear, but only Once a Season, and even then are side antagonists compared to the Urpneys, leaving little time for development.
They Wasted a Perfectly Good Plot: The show has a pretty creative premise, though development of it's expansive universe, cast and mythos are often overlooked in favor of the Urpneys' slapstick taking up most of the spotlight, especially in it's earlier seasons. If it weren't for its name, The Dreamstone could often be seen as any other standard MacGuffin stealing show (not to say it's a bad one however).
Unintentionally Sympathetic: While the show already places a lot of intentional sympathy onto the Urpneys, their defeats are mostly designed to be slapstick and the heroes are designed very clearly to be of higher moral ground. However the Urpneys' damned position, which is either to face a brutal (and sometimes deadly) punishment at the hands of their Bad Boss or go to the Land of Dreams and inevitably get outfoxed and decimated by the sympathizing heroes, or often both, can come off as rather mean spirited in a particular light.
Vanilla Protagonist: The Noops, Rufus and Amberley, end up looking fairly unremarkable compared to the villains and even most of their more powerful and surreal comrades. They take the part well as newcomers encountering the show's different worlds and processes, but the focus otherwise usually sways in the Urpneys' favor due to their more colorful personalities and providing most the show's slapstick.
Wangst: The Noops really don't like getting bad dreams. The Dream Maker apparently has terrified mobs at his door the moment they get so much as one.