It doesn't matter for me to be a good or bad character in game. Both parts are interesting (if you can chose between them during the game I will always play twice) if of'course game is good enought
More importand and interessting for me is not to "save the world" (again) but to care of myself like GTA, Mafia, TR... etc
But if you are the good guy and bad gay will win... it means you'll lost... so you making this about 50 times in game when you are die and have to load saved game so don't do it... just die, turn off computer and bad guy will win