idiosyncratic

ominainen peculiar Peculiar to a specific individual; eccentric.
1886, (w), Dr. Jekyll and Mr. Hyde, ch. 9:

At the time, I set it down to some idiosyncratic, personal distaste . . . but I have since had reason to believe the cause to lie much deeper in the nature of man.

It was no merely idiosyncratic experience, for the youth had the same: it was love!

British Director Ronald Eyre kept the action crisp; he was correctly content to execute the composer's wishes, rather than impose a fashionably idiosyncratic view of his own.