Personally I like the idea of not having to play roles that I truly dont enjoy playing, and I enjoy preferring roles like jester where I actually have fun thats not the same old same old.

I am in favor of a limit restriction on both, as I think that the reward for higher points is an incentive to keep both veterans and new players playing either to enjoy what they worked and played for or to work towards the rewards. The only real problem is when its so many blacklists and prefers that it clogs it up and forces certain boring roles on players, I would suggest 3 blacklists and 3 prefers, I believe this is both balanced and a middleground.