Personality signature must have its own characteristics, and you should write it yourself. You can write a life sentiment or something, but as long as it is created by yourself, it is personality.

Classic:

We all pursue hard, but we like the new and hate the old.

I don't know if what I'm doing now is right or wrong, but I don't know until I die of old age. So what I can do now is to try my best to do everything well and then wait to die of old age.

Don't rely on others, you can only say it when you still have others to rely on.