What are my greatest strengths and weaknesses?

Strengths
I could not come up with this soon.
Maybe my strength is to keep promise or time.
I always keep promise which is done by anyone.
I also keep time.
I often arrive rendezvous before 5 or 10 minutes.
But these are very basic things, so I am not sure if I can say this as a strength.

Weaknesses
This is easier to answer.
I think my weakness is very clear.
I am easy to get effects from anything.
For example, when I read the writing which has dark context, I become very nervous for few days.
This is not good to spend life.
I want to be more strong.