A personalized signature with a clear screen name can be used to introduce yourself and express personal characteristics and preferences. Here are some personal signatures that can be used to introduce yourself:

1. "Love life and be optimistic!"

2. "Follow your dreams and go forward bravely!"

3. "Unique soul, keen on creation!"

4. "Explore the unknown and never stop!"

5. "Release your enthusiasm and energy!"

6. "Face the challenge bravely and go forward bravely!"

7. "Actively jump out of the comfort zone and pursue growth!"

8. "Live high and be yourself!"

Please choose the appropriate signature according to your personal characteristics and preferences to show your personality and attitude.