You guys mean "Best Answers" don't you? I've played around with Yahoo Answers for weeks. Did I miss something?
I stop answering questions at Yahoo answer coz it didn't help me a lot. It's a good service over all.
At first when I started to using Yahoo! Answers for answers to my questions. I got decent replies. Nowadays, I only get more and more crappy and spammy answers. Though sadly, it is the most popular one among the 3 answers sites that I use. My favorite one is Askville. Unfortunately it isn't as popular as Yahoo! Answers. But I got great answers from Askville.
Some answers are really good, but that is a small fraction. I tend to believe ~90% are less than medium quality.
Actually Yahoo Answers help the users to get more and more suggestions. But I think that really there is no chance to get 100% correct Answer.
When I answer questions, I try to make my answers as detailed and informative as possible and I do get some best answer votes. When I ask questions too I'm surprised on the quality of some of the answers and the dedication of some members over there.
I got some answers right. Some people don't know about the topic, and they will present creepy answers.
Yes, yes I have, I asked one question and they answered it right away and It made sense ( I'm assuming it was right too )