I think you also have to be careful about ratios. Up until a few weeks ago, I could see that I was getting about 20% of my answers accepted organically. This ratio has been true pretty much since the beginning of my contributions.
If you check some other contributors, for example [https://www.ifixit.com/User/Graph/739239/jessabethany|jessa], who is pretty much the gold standard in iphone logic board repairs, or [https://www.ifixit.com/User/Graph/1079025/iMedic|iMedic]; they are at 20% . I believe this is normal because a), the answer you give will not always be the correct b), the answer you give will not always be the best one (out of potentially many), c) the OP will not always distinguish the truly best answer, d) the OP will never bother to select or vote and e) the OP will post a question and never come back. Obviously the quality of your answers will have a direct impact on "accepts" but it will never be perfect.
When you look at folks like @jayeff or even myself lately, we benefit from the moderators (@mayer, @oldturkey03) going back in time and "accepting" answers when they appear to properly respond to the question or are the best solution. This comes back to the quality of the original answer.
This is not just for free points though...I believe they are doing this to help new users who search through the archives. When you find an question that is 1 year old, it may 20-30 answers, most of them just clutter (@kyle that is another topic that I will address in another thread). Accepting an answer helps a user focus on the right or best answer rather than trying all sorts of weird recommendations. This is just my opinion of course, the mods can state the true reasons if they like :>).
