It is good to be reminded that from a LaTeX team member's viewpoint font choice is just a style choice. But from a user's viewpoint some choices would be unacceptably odd and others would be not best.
Manuel brings up a technical issue that is decisive for me. Even using the
amsfonts packages you do not have
\mathds. Of course I can easily add the
dsfont package but I can't assume everyone I deal with has it, or wants to add packages for me.
mathbb only handles uppercase letter,
mathds add numerals. As far as I can see looking around online, neither handles lowercase letters (which you probably would not want to see doublestruck).