Don’t like the default WYSIWYG editor? Change it the default to the HTML editor using functions.php

 
# This sets the Visual Editor as >default #
add_filter( 'wp_default_editor', create_function('', 'return "tinymce";') ); 
# This sets the HTML Editor as >default #
add_filter( 'wp_default_editor', create_function('', 'return "html";') );