I have found the community very helpful in answering questions but am often torn as to which answer to accept. I appreciate that answers are largely sorted and prioritised by the upvote downvote system. But I think it would be helpful if, as the asker of the question you had an opportunity to point out what helped you and what you felt was a uselful answer and equally what was not helpful to you.
For example, I recently posted a question in which there were some useful answers, answering different aspects of my question, It would have been nice to be able to mark at least two of those answers as correct or helpful as they both provided valuable info relevent to the question.
Equally I have had many questions which have had a lot of less than useful answers where I would have liked to be able to mark those answers as unhelpful/off topic and ideally grey them out -so that they are visible to other users but dont make it look like my question has received a lot of answers when really it hasn't.
This also affects the askers acceptance rate - I feel that this should reflect the attention you give to the answers, are you giving them time and attention they deserve or just asking questions and leaving them hangin there - rather than the quality of the answers you are receiving.
If multiple answers were to work, it would also make sense if askers of questions could update the status of their questions when reviewing an answer. For example, Resolved, outstanding, withdrawn - I feel this last one would be useful in cases where you have solved the question yourself but the answer was entirely off topic (or you have just realised you asked a stupid question) - I know they say there is no such thing - trust me there is I'm living proof.