vis has become my main editor for monthes now. It is simple and fast enough for things as simple as editing a 3 lines config file. The default config is sane enough as well, so no need to tiker with config files or keep track of them. I tend to use other editors as well, for different reasons:

• vis - $EDITOR is set to it
  
• vi - when vis is not available (so basically every remote machine I log into, be it mine or for work)
  
• ed - for low-spec/really old machines, and when editing file remotely from my phone
  
• redirections/heredoc - for when I just need to dump some content as-is into a file
  
• leafpad - for times when using a mouse is easier
  
• notepad++ - don't judge me too fast.