Controversial Manga Characters?

[Night x Core]

Have you ever read a manga series and realized that not everybody is completely good or completely bad? I have a soft spot for those characters (especially cuz they usually start off bad and turn good sweatdrop ) but there are some that really get to me and make me think and sympathize. They are the ones that make the manga interesting and give it depth, not just the whole good vs. evil cliché. I was wondering if any of you felt the same way about those characters + say who they are blaugh

Mine are:

Itachi - Naruto
Medusa/Chrona - Soul Eater
The Marines - One Piece
Byakuya Kuchiki - Bleach (Soul Society Arc)
Giovanni - Pokemon Adventures