Primarily a left winger, Liddell's versatility enabled him to play comfortably on the opposite wing and as a striker, at centre and inside forward. Liddell became noted for his strong physique, acceleration, powerful shot, professionalism, and good conduct on the pitch. Such was his influence and popularity that the club acquired the contemporary nickname "Liddellpool". Posthumous recognition has included a plaque unveiled in 2004 at Anfield and sixth place in a poll of Liverpool fans, conducted in 2006 under the title "100 Players Who Shook The Kop". He was inducted into the Scottish Football Hall of Fame in November 2008.