user-1: I always favorite great questions , but I can't favorite an answer. If we can favorite good questions, why shouldn't we favorite great answers. 
This can have two advantages for the site:

We can have favorited answers by many users and we can realize how good our answers is.(favorited answer is more valuable than upvoted answers)
Also we can have three or two badges for it ( stellar answer(gold badge):An answer favorited by 100 users  -  favorite answer(silver badge):An answer favorited with by 25 users)


user11841: If you feel an answer is great please upvote it. That is why upvotes exist. 
If you enjoy an answer very much, you can start a bounty on the question and award the bounty to that answer. Answers with bounties will show that it is well beloved!

user10456: This lack of a feature has been discussed to death on the Meta SE forums. 
In short: Jeff Atwood (one of the SE head developers) has refused to add this feature to the SE site, and this feature is unlikely to be added any time in the near future. As expected, it was downvoted to hell. Unfortunately for us, the bookmark (or favouriting the question itself) appears to be the best option for this for now. 

-1: <p>I always favorite great questions , but I can't favorite an answer. If we can favorite good questions, why shouldn't we favorite great answers. </p>

<p>This can have two advantages for the site:</p>

<ul>
<li>We can have favorited answers by many users and we can realize how good our answers is.(favorited answer is more valuable than upvoted answers)</li>
<li>Also we can have three or two badges for it ( <strong>stellar answer</strong>(gold badge):An answer favorited by 100 users  -  <strong>favorite answer</strong>(silver badge):An answer favorited with by 25 users)</li>
</ul>
 11841: <p>If you feel an answer is great please upvote it. That is why upvotes exist. </p>

<p>If you enjoy an answer very much, you can start a bounty on the question and award the bounty to that answer. Answers with bounties will show that it is well beloved!</p>
 10456: <p>This lack of a feature has been <a href="https://meta.stackexchange.com/questions/2588/mark-answer-as-favorite-star/147592#147592">discussed to death on the Meta SE forums</a>. </p>

<p>In short: Jeff Atwood (one of the SE head developers) has <a href="https://meta.stackexchange.com/a/107790/278258">refused to add this feature</a> to the SE site, and this feature is unlikely to be added any time in the near future. As expected, it was downvoted to hell. Unfortunately for us, the bookmark (or favouriting the question itself) appears to be the best option for this for now. </p>
