Another way to think of a weakness is as a roleplaying aid. A player
is very very unlikely to get themselves into a situation where they must
roll against the trait of 1. How that trait is defined, is more of a
roleplaying guideline. So, you see Superman staying the heck away from
Kryptonite, Spiderman having all kinds of issues in his normal life, and
the Punisher having serious issues when trying to act like a normal
human being.

None of those characters is rolling against a trait that is at 1,
because they're roleplaying thier weakness. If one of those characters
were to actually FIGHT the weakness, eg: Spiderman being somehow a hero
to his boss, Superman being mysteriously immune to the effects of the
Kryptonite, the Punisher sitting down in a formal resturant and having a
nice normal evening out, then the player would be rolling against a
trait of 1.

If my character has a weakness that says "A woman in a man's world"
and I narrate my character being accepted on even footing with men, or
trying to act in a manner that is contrary to the given role, then I
roll against a one. If I play to type with seduction, manipulation, and
flirtatiousness, then I don't roll vs a 1.

Aaron S.