The major disadvantage of a wall-based personal taskboard is its pure static character. You can't take it with you for travelling or for working on it at home.
Here's the solution: the mobile personal taskboard.
Side note: this version of the personal taskboard is not used by myself but I like the idea a lot. For me it works to move the 2 most important task from my wall-based board into my paper book. So my paper book is some kind of additional optional external kanban lane.
Don't forget: always inspect and adapt! This topic will go on for sure...