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.
Acceptable Targets: Fatness is still an acceptable target even though Po, as a panda, is a fat creature, so to speak.
Po is frequently portrayed as shirky and lazy. This may also be based on misconceptions of Real Life pandas, but that only adds a different layer of Unfortunate Implications, what with him being Chinese. Then again, everyone is Chinese.
Po himself has made jokes about Monkey's cheeks looking jowly.
Broken Base: Split between those who consider it a good addition to the films, those who consider it a good show but prefer to think of it as a separate canon, and those who disown it entirely.
Flanderization: Po in the latest three episodes, "The Way the Prawn", "Mouth Off", "The Serpent's Tooth", where Po's character is so blown out of proportion, one can easily blurt out "This is not Po!" and any flak he receives from Shifu and the Furious Five is unjustified at best.
Foe Yay: One-Sided Tong Fo/Po. He got so excited when he realized Po was the Dragon Warrior and had the nerve to say it to his face.
Ho Yay: Shifu is...a little too much of a Fanboy toward Yao, particularly during his "beautiful, brilliant brain" speech.
Po's commenting on Shao's "defined muscles" in "Bride of Po" was...interesting.
Hundun crosses this by threatening to kill Po's father just to force him to fight him. This also makes things personal for Po.
Tong Fo counts too, wanting to destroy the Valley of Peace for no apparent reason.
Ke-Pa crosses it when he temporarily killed Po.
Nightmare Fuel: The jumping ghosts of "The Po who Cried Ghost". Those things are hideous and creepy as heck.Their jerky, unnatural movements easily put them into the uncanny valley, and the fact they can raise from their tombs at any time to get you is quite unsettling
The Scrappy: Prawn samurai Yijiro has a considerable hatedom for his Ship Tease with Tigress, and it's not surprising at all given the sheer bizarreness of the premise. For many, it ruined an otherwise awesome or/and interesting episode with Japanese elements.
Special Effects Failure: In Royal Pain, there is a scene where an arrow is shot at Meng Tao, who manages to duck and make it hit the rock behind him. When he stands up straight, the arrow clips through his skull.
Squick: Tigress had a crush on Shifu when she was a teenager. He may be her father through adoption, but still...
The Woobie: Po puts up with a lot of crap in this series...
Also Bian Zao qualifies as one.
Holy cow, Peng. His uncle, who he's been seeking for goodness knows how long, was evil, his best friend and idol was thus forced to kill him, and now it turns out the poor boy inherited Tai Lung's dark side. His leaving the Palace and giving up on Kung Fu forever was played completely straight.
Jerkass Woobie: It's not hard to feel bad for Taotie, what with his backstory of being kicked out of the Jade Palace for trying to compensate for his poor kung fu with his passion for mechanisms, having a son who doesn't respect him, being constantly humiliated by the Furious Five, and outright sobbing pathetically at his failures ... however, as seen in is episodes any time he does come out ahead, he immediately becomes a major jerkass, wanting to painfully humiliate Shifu and the Furious Five, up to torturing them to death.