If people want to role-play, they should do so within the confines of their own head-canon. I have a number of characters myself and none of them are the 'Warrior of Light' or involved directly with the MSQ's. The one I play at present is a Hingan seeking to forge trade deals with Hydaelyn's various nations to strengthen his homeland's dominance. Another character of mine is a world weary Garlean Pureblood who wants his people to not have to take up the burden of dealing with Eikons so that he can focus on protecting his family and comrades in arms.

The MSQ's are fairly 'on rails' yet it works out for the best given that not every point of view or potential personality could be accounted for.