I don't know why, but when I played 0ad the first time, I had the urge to hack into the rendering code to allow for a 3rd/1st person view for a unit, just to get closer to the action. I think it just because everything looks so nice and high quality, it makes you desire more immersion. (Its not a shortcoming, actually very much a complement to the devs!) To actually be able to 'do' anything though I would imagine might be complex, ie, attacking or interacting with the simulation due to the networking model...