一癖[hitokuse] trait
飲酒癖[inshuheki] alcoholic addiction
奇癖[kiheki] strange habit
癖者[kusemono] ruffian
潔癖[keppeki] fastidiousness

口癖[kuchiguse] way of saying
習癖[shuuheki] (bad) habit
常用癖[jouyouheki] addiction
性癖[seiheki] disposition
盗癖[touheki] kleptomania