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.
Awesome Art: Seriously, the designs that go into the setpieces are amazing. There are numerous intricately detailed holograms that line buildings that are in themselves rendered in incredible detail. And while the tone and coloring of TRON: Legacy was on the darker side, Uprising occasionally breaks things up with beautiful arrangements of color in the holograms or building exteriors.
Design Student's Orgasm: It doesn't come off as too overt, though, given that the setting is normally cluttered with bright lights and visuals. The artists just went the extra mile to make each of those lights/visuals pretty.
Cult Classic: Even moreso than the two TRON films. Thanks to poor advertising, extended hiatuses, and a short run, as well as Disney XD's status as a cable channel, not many people have seen the show. However, the reception among those who have watched it is almost unanimously positive.
Foe Yay: Paige isn't too subtle about this with Beck.
Heck, in the intro to "Isolated", it's outright stated that she's infatuated with him.** Beck (as himself) spends half of "Welcome Home" flirting with Paige. It started as a distraction, but he keeps doing it even when he doesn't need to.
Beck and Cyrus anyone?
Moral Event Horizon: Tesler's more extreme Kick the Dog moments can come off as this. One of the earliest is attacking and massacring a hospital because an ISO had visited it. If he didn't cross it before, then he did when he murdered Keller after she returned to the Occupation of her own free will.
Pavel went from a noticeable lieutenant who was a major prick to an incredibly dangerous villain during the events of "Rendezvous", where he used the upgrade disc to casually murder several programs, staged an elaborate frame-up of Paige to keep her from ratting him out, tried to kill her, then finally blamed it all on the Renegade while having his accomplishes silenced.
Uncanny Valley: Because of the very stylized graphics, some of the program's faces and hairstyles are really weird and/or ugly. It's usually in the form of a somewhat normal looking face with a huge block Cleopatra Nose or some other exaggerated feature that tends to look like a deformity. Beck, Tron, and arguably Tessler's faces are some of the few that aren't really weird and unattractive.
It's also gets weird when Flynn and Clu are shown unmasked, and their faces are lined realistically. Because of the cel-shading, they still look like they are line drawings or caricatures. In a nice bit of subtlety, Flynn emotes realistically and his features move in a way that is almost natural. Contrasting him is Clu, whose face is completely rigid, and the age lines and beady black eyes make him look almost demonic.
Visual Effects of Awesome: The show blends the styles of hand-drawn and cel-shaded computer generated art really well. Static images and backgrounds sometimes look as if they were hand-painted, and the action and fight scenes are much more fluid and intricate than most CGI productions. Only the faces and some of the moving vehicles give away the 3D feel.
What an Idiot: Beck taking off his helmet when he's supposed to have a secret identity, because it is uncomfortable. Lampshaded by Tron; when Beck does it in a simulation, he's recognized and distracted with mention of Bohdi's death, then Derrezed. After that, Beck keeps his mask on when on duty, all the time.
What Do You Mean, It's for Kids?: It's frankly amazing the kind of gore this show can get away with because its characters aren't human. Characters are routinely killed, have holes punched in them, etc. "The Reward" went so far as to have a still-living guard who was bisected at the waist crawling along the ground, bleeding the whole way, until he gets stepped on and completely derezzed.
Many of the deaths involve bisection, severe impalement, getting gibbed, or getting chunks ripped out of them, and you can be sure that all of this is shown on screen. Torture is pretty vicious, too, involving bits of the program getting vaporized out. At one point, Beck is being boiled alive while strapped to a chair. The show gets away with this because, being programs, there's no flesh or blood, merely featureless bluish cubes.