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.
YMMV: The Witcher 2: Assassins of Kings
Complete Monster: Bernard Loredo from the second game. As if it's not bad enough that he provoked a program against the non-humans in Flotsam, he also captured an elven woman and likely raped/drugged/tortured/traumatized her so much she was suicidal and didn't know what month it was. While most people think that she was killed by monsters, she's still alive and imprisoned in Loredo's mansion. And pregnant...
Henselt doesn't seem so bad when you first meet him. Then there's what happens to the Blue Stripes in the Roche path, and especiallyVes.
Fan Dumb: Some players have complained about the second game's moral options, claiming that the game only has evil choices, and that most of Geralt's potential allies are villains. The concept of moral ambiguity goes right over some people's heads, it seems.
Game Breaker: The one from the previous game, the Igni Sign had been nerfed, but Aard and Quen (and even Axii to a point) can easily reach this level.
Bombs. You can make a load of them and just chuck them out like candies. Works especially well on bosses, even better if you brought the skill that multiplies the damage dealt by 100%. And the fact they just need two most common alchemy ingredients makes it all easier.
Heck, Igni still counts too, you just have to invest in it. With maxed spell damage enhancements and skills, hammering the sign key to machine gun out fireballs will rapidly drain the health of anything not immune to fire. If your enemy is one of the few which is fireproof, blast em' anyway- a single blast from Igni will force them into a few seconds of flinch animation, dropping their guard.
Moral Event Horizon: The deciding factor for most players killing or sparing Henselt is probably whether or not they can stomach the thought of him living after raping Ves and gloating about it right in front of Geralt and Roche.
Doubles as one for Roche. Henselt just killed all of his men and raped Ves. His purpose through the game was to track down the kingslayer, only to be willing (or for some, successfully) to become one himself.
The heartbeat sound when you drink a Cat potion. There's a reason that mods on PC that increase potion effect longevity leave Cat alone.
Stripperiffic: Saskia's armor shows a lot of cleavage over providing protection to her heart and lungs. Potential Fridge Brilliance however, as she doesn't need the protection anyway, given that she's actually a dragon; her ability to heal is epitomised by quickly recovering from impalement at the end of chapter 3. Also, the sexy look could help sway the peasantry to her cause.