My usage of manpages would increase by orders of magnitude if I knew there were examples of actual working commands in the first page. Most of the time I am not looking for an obscure parameter, but my brain just has failed to take a note of the basic syntax of the command. So why not start ssh manpage with two simple examples, how to connect to a host with username and ssh key:
ssh [email protected]
ssh -i ~/.ssh/id_rsa [email protected]