I have also been working on my edge flow within my 3d models as I intend to be animating the character. This is imperative because if the edge flow is terrible it means that the characters movements will look very jagged and nasty. I am in the midst of creating a male human character which could "potentially" be our main character. Although we are talking about using a child as the main character. This could come in handy at some stage no doubt. I have been working in very low poly so that the character wont slow our game engine down a whole lot. I have also investigated Z brush and become familiar with is however it is mainly used for fine details and bump maps which I don't think we will be needing for our character.