I have several questions with really good answers. However I'm not sure what to do right now....who deserves the best answer in questions? Most upvoted answer or my favourite answer? Good night!
The acceptance mark is an indicator of what helped you, the person who asked the question, the most. On some sites you can test answers (compile the code, etc) and that can help you choose, but that doesn't work so well on Worldbuilding. Most users, I think, are guided by the community voting, but you aren't required to go by voting. If the community really hates an answer you should ask yourself why before following its advice and marking it correct, but you're allowed to disagree with the community.
You don't have to accept an answer. The absence of an acceptance is ambiguous; it might mean you need more help or it might mean you got several good answers and can't choose. Sometimes we just have to tolerate ambiguity. :-)
It's also ok to to wait. Newer users sometimes accept an answer within a few hours of asking; I find it's better to wait a few days (or sometimes a lot longer).