There is a reason Kurapica is both loved and hated. He is Sasuke. Both have eyes that turn red for a power up. Both their clan has been killed and both seek revenge. There are some key differences though that make Kurapica more lovable. Kurapica is friendly and polite to people. He see's Gon and Killua as friends rather then rivals that needs to be kept at an arms length or competed with. He actually act toward the goal of getting revenge, rather then talk about it but never actually do anything. And he plan, choose and train to gain his abilitys. Only time Sasuke trained hard was when he learned Chidori. Other then that he has always relied on hax eye power. He need to brood so he don't have time to train.