I'll be honest, out of the three main characters in the show, Maximus is probably my least favorite of the three.
That's not to say that he's a bad protagonist by any means, in fact, I actually like all three of them. But compared to the Ghoul being a total badass with a tragic backstory and Lucy's hilarious fish out of water story arc (not to mention her incredible legs and amazing ass, because let's be real here), Maximus just doesn't really have a lot to him yet.
Maybe in Season 2 I'll grow to like him even more.