I was looking around and the questions and answers did not seem to match what I am looking for. Anytime I open a new file it defaults to a plan text file. I mostly work with
It is possible with the ApplySyntax Plugin. Once it is installed (e.g. via PackageControl), you can set the ApplySyntax User Settings like that:
"new_file_syntax": "HTML",
Now if you open a new file, your default syntax will be HTML. Of course you can set every Syntax you have installed.