Originally posted by: sareeta
@Musical Aishwarya - Coz voldemort did it for the simple reason to feel powerful, it was not a cheering act for him. He was too obsessed with his power and his battle to conquer death! But to just enjoy the pain of others for pleasure is something that qualifies for sadistic which I dont think voldemort fell into.
In many parts of the books, Dumbledore and other characters like Arthur Weasley wrote about how Voldemort and his Death Eaters enjoyed seeing the pain of Muggles while they tortured them. In Half Blood Prince, Dumbledore told Harry that as a child, Tom Riddle tortured the other kids in the orphanage and that became the only source of enjoyment for him, because seeing others' pain gave him the pleasure of being in control.
And during the Death Eater attack in the beginning of Goblet of Fire, Arthur Weasley explained to Harry and the others that the Death Eathers, when torturing those three muggles, had used a technique often used in the 1st War against Voldemort.
Maybe Voldemort did not feel pleasure when torturing other Wizarding people, but he did feel pleasure when torturing muggles, and it's written in many places in the HP books.