Have you performed the best work you are capable of?

Good answer
Yes I have, and I’d like to think that I do it on an ongoing
basis, not just on so-called important occasions. Performing
the best work you are capable of, in my view, requires high
levels of motivation and a willingness to work hard and learn
from your mistakes. These are qualities that I bring to the
workplace every day, and I believe the proof of this can be
seen in the quality of my work and the praise I have received
from former employers. My work on the Odysseus Project,
where I exceeded all my targets and played an important role
in bringing home the goods, is an example of my daily work
rate and contribution.
Not so good answer
Yes I’ve managed to perform at my best on several occasions.
I tend to be at my best when the pressure is on. If I know
there’s a lot at stake I roll the sleeves up and really give it all
that I’ve got. If that requires working late and on weekends
then so be it, as long the job gets done. I love a challenge
and enjoy delivering the goods under pressure.
Comments
The strength of the first answer is its argument that performing at
one’s best is something the candidate does all the time rather than
an occasional approach reserved for special circumstances. It also
lists the qualities required for someone to perform at their best and
then goes on to give a specific example. The second answer is
commendable for the candidate’s willingness to roll the sleeves up
when there’s a lot at stake; however, an employer would like that
sort of dedication all the time.