In Ch 3, Pg 86, point 11: The line reads...

11. Scroll Down to Database Name and set it to WSS_Content_My

Is this really the DB name to use, or should it be WSS_Content_DB like all the other DB names? Will this bite me in the end?

Barbunc

The suggestion to name the database "WSS_Content_My" is just that, a suggestion. All of your DB names are completely arbitrary and hold no value in the name itself except to clue you in on what the database might contain. My database names are usually along the lines of "SharePoint_Content_DB" or "SharePoint2013_Admin_Content". You could also name the database "WSS_Content_MySites_DB" or "WSS_Content_My" as suggested or you could name it "WSS_Purple_Unicorns_DB".

Your database names ideally should follow some sort of convention system, but it is completely up to your discretion on what that system follows.