I use y'all, or omit the apostrophe to just yall. And I am a northern boy in the United States, not southern.
The reason is simple: I respect women and dont let my disdain of southern culture rule the way that I speak. If there is a good word, then I use it. Y'all is simply a very good word that allows for a genderless plural. Youse isnt that popular and likely wont make a dent in our language.