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.
Salazar Slytherin. His concerns, about muggles, since this was the era of witch burnings, were rational at the time. He also appears to have been more of a Mad Scientist than Evil Overlord.
Chaotic Good: Team Torchwood, Harry, and most other good students.
Magnificent Bastard: Jack, Ianto, Lucius Malfoy (less than the previous two).