First I must say that Obito is my お気に入り character from NARUTO -ナルト- now. I say now because we weren't sure if Tobi was Obito, but I'm glad that he is and I was expecting it! I can't wait to see him in the アニメ too!
Τhis may sound crazy to あなた but the main reason he is my お気に入り is the sudden change of his actions and the revelation of his true self.I never imagined that he would have such a capability to switch his behavior depending on the circumstance! I admire him for that and also adore his fighting skills (jutsu, genjutsu)!
My sister and I lay claim to アニメ characters to avoid arguing over them. Unfortunately, she got Obito but I have Itachi! Hahahaha. And just because he's her's, doesn't mean I can't be a fan!