self-expression
noun [ U ] uk/ˌself.ɪkˈspreʃ.ən/ us/ˌself.ɪkˈspreʃ.ən/
（尤指通过艺术、音乐或表演的）自我表现，自我表达
expression of your personality, emotions, or ideas, especially through art, music, or acting
He regarded poetry as sentimental self-expression. 他把诗歌看成是一种感情的自我表现。