我不好但全世界只有一个
[wŏ bù hăo dàn quán shì jiè zhĭ yŏu yī gè]
'I'm Not Perfect But I Am The Only One In The World'. This represents an acknowledgment of personal flaws while also highlighting uniqueness - nobody else shares your precise mix of attributes, strengths, and imperfections, thus making yourself irreplaceable in some perspectives.