idiosyncratic

US /ˌɪd.i.ə.sɪŋˈkræt̬.ɪk/
UK /ˌɪd.i.ə.sɪŋˈkræt̬.ɪk/
1.

istimewa

having strange or unusual habits, ways of behaving, or features:

:
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The film, three hours long, is directed in his usual idiosyncratic style.