.
It can often come down to what you like to skate, or even how you like to skate.
Example 1 (simple dudes who skate):
I am more into transition and ramp, more so than street stuff, so wider trucks work better for me on everything, usually 149s or 5.8" with three washers on the inside of each wheel on 8.38 boards.
A friend who is way more into street, specifically tech rails, ledges, flips, is definitely happier on not so wide trucks, usually 144s or 5.6" with one washer on either side of the wheel on 8.38 boards.
Example 2 (established pro skaters):
Peter Hewitt, vert and big bowl skater, 8.38 with 159s on it.
Andrew Reynolds, street tech, always narrow trucks on wider boards.