I have thought of a few times when "Click here" just plain sounds appropriate, which they have all been mentioned, such as:
"If you aren't bob, <a>click here</a> to logout." sounds better to me than "If you aren't bob, <a>logout</a>."
"Click here if you would like to read more." or "If you would like, <a>read more</a>."
etc.

Those aren't the best examples and I had some betters ones which I forgot, but I think sometimes it just sounds more appropriate to use a "click here" then it does to try to be proper with your link.