I can see where a lot of people would would pick Ashe as the heroine, but she got on my nerves so much, i sorta started to dislike her. Maybe thats why i picked penelo.
But for the hero i'm still gonna say Balthier. He says it himself a few times 'I am the leading man after all.' But not even that. The last set of FMVs with SFB and everything just sorta portrayed him as the Hero. And the story revolves around him more, i think, (SPOILER)what with Dr. Cid and Balthier having been a judge and all. But then again, its just my personal opinion.