Welcome to the Weekly Question Thread on c/guildwars2!
This post is dedicated to those questions that you might not think is worth making a whole post about, but sure is worth getting an answer to ;)
Remember to also take a look at the links in the sidebar, which holds lots of great resources.
On my primary account I actually completed the core story on all 9 characters/professions. But from there on (Expansions + Living World) I did the story and mastery unlocks almost entirely on my 2 “Mains”. Sometimes following up with another character, if I was missing an important achievement, e. g. for a legendary trinket.
Map completion is a different story. I’m aiming for 100% (at leaast all hero points and all waypoints) on all maps and all characters (on 2 accounts). Which means that I’m not running out of stuff to do any time soon.