I have three
1. well duh it would be Itachi lol I love him because of his back story. He grew up loving his family but ended up as a double spy for his clan and village and in the end had to kill one of the things he held close. He wanted to die by his brothers hands to make sasuke stronger and even till the end played the part he had to so that his wish would come to pass. But before I found out why he killed his clan it was because he was just an all out bad*** lol
2. Shikamaru lazy as ever but smart and... powerful when he wants to be lol besides 'what a drag' makes me laugh all the time
3. Neji because he is just awsome and is another with a sad back story