You know the writing is great when you find this type of characters that can be equally appealing and hated at the same time. It's great to have characters that go beyond good and evil and explore a deeper personality, more likely to the real people.
Great post!
Yes my friend, you're absolutely right, it's not easy to create this kind of characters but Togashi did it very well. Possibly it is their development and the resemblance to real people in their character that attracts attention.
Regards