人に一癖。
Every man in his way.

彼の飲酒癖は今に始まったことではない。
His drinking habit is an old one.

私の祖母は、口癖のように１００歳まで生きると言っていましたが、８５歳で亡くなりました。
My grandmother used to say that she would live to be a hundred, but she died at the age of 85.

彼の変わった性癖が彼らを困らせた。
His strange habit confounded them.

へたな職人は道具に難癖をつける。
It's a poor workman that blames his tools.