More often than not, I get more than one really good answer to a particular question that I have posted.
There is no way one can appreciate that more than by up-voting both answers, because we are only allowed to accept one answer, and I have already accepted another answer.
A way to accept more than one answer would be useful.
Technically this already exists, the answer accepted by the original poster, and the answer accepted by the community (i.e. the one with the highest votes).
Have more than one accepted-answer can be confusing.
If two or more answers are acceptable, they should probably be adapted into one single answer, and then that one should be accepted.
To me, a nice comment saying:
This is a good answer, too, but I can only accept one.
...is just as good as getting that little check mark. Sometimes it even gets me a vote boost if other people think my answer should have been accepted. Bonus.
Part of the reason there is one accepted answer is to distill knowledge. When other people use your question as a resource, they want to be immediately directed to the one most useful answer you received. This is also why subjective questions are discouraged: ideally, there should be only one correct answer to a question.
Allowing multiple accepted answers dilutes the value of an accepted answer, and makes the format more forum-like than Q&A.
