If you were always writing in HTML, you could add the following to your `functions.php` file:

    remove_filter( 'the_content', 'wpautop' );
    remove_filter( 'the_excerpt', 'wpautop' );

I do this for some of my own sites. 

As it sounds like you want the option to turn this on or off, you may want to try the  [wpautop control](https://wordpress.org/plugins/wpautop-control/) plugin.

This should let you turn it off on your posts, while leaving it on for other users.