Q. I have been told by more than one recruiter to shake the interviewer’s hand and say I really want the job. Do you agree with this advice?
A. No. Thank the interviewer for their time and go. 
You made whatever impression you made during the interview itself. 
I don’t want you to devolve from a competent, confident professional to a muley job seeker at the end of the conversation. They know you are interested or you wouldn’t have sat through the entire interview. Send a nice thank-you note after the interview and call it good!