2 points
\mathbf{} cause I can just use Ctrl+B on overleaf.
2 points
\mathbf
. It’s consistent with \mathrm
for well-defined constants
3 points
Neither, I just write a symbol.
1 point
3 points
If you like mathbf more then at least redefine vec and use vec. Keeps the code more tidy.
I haven’t heard those names in a long time…