To Aru Majutsu no Index 14 wraps up the third and best storyline from the novels I've
read. Best largely because Accelerator is fucking awesome.
His power is both simple and yet ludicrously limitless when it comes to creative uses; he'd fit right in as a Jojo's Bizarre Adventure lead, and probably without needing all that much personality change. Sure, he's a totally vicious self-centered asshole, but that never stopped anyone in anime from becoming a hero in the next storyline. Or the one after that.
Nobuhiko Okamoto is worth name dropping; I think the voice acting in this is generally quite good, sounding like mainstream anime acting with a little more range, but this dude - who doesn't appear to have done much before - really goes to down. The fucking bizarre laugh, the downright glossolilian gurgle he gives before summoning the plasma beam - shit is worth of a Baccano! character.