[AoshiShinomori]

The characters I hate the most are those with potential to develop into deep ones but stop halfway. From deathnote there was Mello. A lot of intelligence, but all laid to waste in one half ploy. I wish he'd been there longer in the series.

From kaze no stigma, there was Genma. A lot of power, a stoic outlook but absolutely no improvement or involvement in the series except for a comedy fight with his son >_<. That really ticked me off.

From Rurouni Kenshin, there was Shogo Amakusa. Phenomenal power and training but after six episodes into the arc they reveal a soppy storyline about his history. Ah well! I gues you can never have the cake and eat it too ^^