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: Tomb Of Horrors
Complete Monster: As a "private" joke, Acererak kidnapped a kind and beautiful Siren put her under an enchantment and traps her in a cavern inside the Tomb of Horrors. Most players would react on the Siren as being a trap or just one of many monster and possibly killing her instead of trying to help her and ask her to come with them. Acererak is a twisted person indeed. Later editions of the quest replace her with a common mook to fool veterans who have played the original quest.
Heartwarming Moments: Asking the Siren trapped in the Gold and Silver misted cave to join you would free her from the enchantment trapping her in the cave and make her the players' friend for life. Heartwarming indeed.
The Woobie: The Siren in the original version of the Tomb of Horrors. Trapped inside the tomb as an personal joke by Acererak. She is cursed so she can't leave the cavern she is trapped in, and neither can she say how to lift the curse, she can only hope the players "Ask her to join them" to lift her curse. Ofcourse most players would suspect the Siren to be just one of many traps, a shmuck bait or just a monster or simply take one of the bag of holdings resting beside her, resulting in her being erased from existence. Ofcourse, saving her would make the players' friend for life.