I don't see how this works in the context of scrum as I've seen it done, except in the weak case of you getting to raise the ticket of whatever topic you'd like.

I guess you could ask for no around specific implementation details too? So if you are working on ticket XYZ that could be solved in N ways, you could pick one that might be a bit out of the norm (but still solves the problem) and 'ask for no'.