It will depend how much development time they will have available.
Because to have a decent Evil Protagonist they need to apply characteristics for example: Lawful evil personality, Chaotic or Neutral evil.
With a decent plot to justify how the main character shaped himself in the twisted path.
I think with that PAX Q&A Gaider saying that he want specializations to make a real impact in the character being, that would be an excellent opportunity for it.
Besides everything that I said,it would be ideal to have companions that are easily influenced by the Main character to go down the path with him (Not all companions because that would make no sense) and adding exclusive evil members, new members that actually seek that other ideal.
Example:
Good path: Takamori the Templar have X,Y,Z , M and N companions because they have the feel their goals cross.He is a Templar that understand mages are living beings too, so he tries to not be so harsh and treating them the best he can, but still maintaining his guard against blood mages.(A side that rarely Dragon Ages shows sadly

)
Neutral: Takamori the Templar , still have the same the companions, but though he is more law oriented, if the law said so he will follow, won't see the bounds of good and evil.It's need to be done because the high order knows more about balance and social control then him, so he is just the sacred tool to keep the order in the Chantry.(Though M and N might complain time from time for being so dutiful , but will understand his personality and won't see him as a bad person)
Evil path: Takamori the Templar tyrannical Templar, despise every mage in existance, takes pleasure in torturing and killing then , because he understand they are a major threat to society.Understand that he is a superior individual compared to the others since he is the tool of banishing the unclean mages, that only bring blood magic to this world.
Due to that nature, X,Y,Z , still follow him, because the Main Character made convincing arguments of how his point of view is the right one.He is right to take no chances with mages, don't matter if they living beings with feelings.Order in all cost(Lawful evil).
Though M and N, having their vision pretty much solid of the situation, understands that Takamori is wrong , leaving the party , since they see him as a monster.Introducing new companions that actually follow that path.
Just personal thoughts.
Modifié par Takamori The Templar, 12 avril 2012 - 02:07 .