I disliked the behaviours (and situations) of some characters, but I have never hated any of them or anything. I will say, however, that as the manga progressed, there were certain characters (i.e. Itachi, Sasuke, Naruto, Sakura, Kakashi, Obito, Kisame etc.) who I learned to appreciate more and became more attached to.
I like this thread; it is really refreshing *_*