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.
Complete Monster: The Master receives perhaps his most twisted portrayal yet in "The Glorious Dead". He destroys history, transforming Earth into a planet made up entirely of radical xenophobic fundamentalist psychos led by an immortal nihilist sociopath. He then proceeds to wreak havoc and destruction across the entire universe all to spite the Doctor. It's by far his most dick-ish portrayal yet.
Fanon Discontinuity: How many people treat the Sixth Doctor strip "The World Shapers", for its claim that the Cybermen were descended from the Voord of "The Keys of Marinus", which is often considered pointlessly over-complicated Continuity Porn (especially when compared to the Big Finish audio story Spare Parts, considered the definitive Cybermen origin story). Some fans also dismiss the same story because of the rather sad (albeit heroic) fate it depicts for Jamie.
The Eighth Doctor comics Master wasn't based on any real-world actor at the time, but retrospectively he looks quite a lot like Samuel L. Jackson as Stephen in Django Unchained.
Iron Woobie: Despite heavy angsting to begin with, by the time of Children of the Revolution, Izzy brushes off the body swap with a joke and even embraces her new abilities.
Jerkass Woobie: Destrii suffered horribly at the hands of her mother, grew up friendless on a world with the expectations of an entire nation dumped on her shoulders and had to fight for her life in constant gladiatorial battles. Despite all her misdeeds, you just end up wanting to give her a hug. She becomes an Iron Woobie later as her most noble moment yet is rewarded by her uncle, the one person she liked and trusted in her whole life, beating her to a bloody pulp and leaving her for dead.
Wangst: Izzy, over not knowing the identities of her parents.
The Woobie: Izzy. Despite a large dose of Wangst surrounding her adoption issues, she's rather understandably devastated by the body swap, as she faces the realization that she can never see her family and friends, or live a normal life again.
Kroton, part of one of the Universe's most dangerous races who is afraid to remember his life before.