Some actors will forever be tied to their most famous roles, to the point that they cannot realistically play anyone else. Richard Thomas will ALWAYS be John-Boy Walton. Ron Howard will ALWAYS be Richie Cunningham. Ed O'Neill will ALWAYS be Al Bundy.
Being a long time fan of the entire Dragnet series (dating way back to when Jack Webb played the role) I happen to like the year 2003 version a lot. I disagree with Auriaprottu i-- I think that Ed O'Neill DOES plays a very effective Joe Friday.
Adam West is always Batman. Fred Gywnn is always Herman Munster. And Steven Seagal is always horrible.