If you don’t like that the ‘read more’ links automatically scroll you down the page (to the beginning of what ever comes after the <–more--> tag), you can so a little pattern matching to remove the internal anchor.
add_filter( 'the_content_more_link', 'read_more_no_jump', 10, 2 );
function read_more_no_jump( $link, $text ) {
$no_more = preg_replace( '/#more-([0-9]*)/', '', $link );
return $no_more;
}