When I was commenting on the RAW meta question, I started to document how I vote on answers. Here is mine.
I always up vote an answer if they answer the question, even if I think the answer is from my PoV wrong.
I leave an answer zero, if I think the answer does not answer the question.
I don't normally down vote an answer unless I think it is spam, offensive or so way off mark to be close to the edge in some way.
I tend not to let what I think of the way an answer is written, its System, or Individual that wrote it influence my vote.
I normally try to leave a question for a few weeks before blessing an answer. Sometimes it is not worth it as the answer you have is the only one you will get and I will closed them very quickly.
If I have no answer or I think no answer is worthy I will added my own and then Bless it. I don't think answer as part of the main question are the correct thing to do.
If I think and answer is close enough I will bless that answer then may be add my answer to document my PoV, which may not be everyone else (hence I don't bless it).
Anyway that is what I do. I hope it helps. May be other have better strategy and would like to comment?