expression
great men have eccentricities; fine horses have quirks
Proverb meaning that outstanding people or things often have unusual or difficult traits; used to excuse or explain someone's peculiar behavior by likening them to a spirited horse.
彼は変わり者だけど、名馬に癖ありというからね。
He's an oddball, but as they say, great men have eccentricities.
あのピアニストは気難しいが、名馬に癖ありだ。
That pianist is temperamental, but fine horses have quirks.