Super Admins can always comment

<?php
/**
 * Keep comments open for super admins (me)
 */
function eth_allow_me_to_comment( $open ) {
	if ( ! is_user_logged_in() ) {
		return $open;
	}

	if ( is_super_admin() ) {
		$open = true;
	}

	return $open;
}
add_filter( 'comments_open', 'eth_allow_me_to_comment' );