I just listened to all three of the posted versions again... What struck me about Barbra Streisand's version is that she uses her voice like a musical instument (as indeed it is), but without any attention to the meaning of the words -
just the music. And of course she's very good - if you listen to her as if her voice was a clarinet, for example, it's great.
Hope all that is comprehensible
And I voted for Cher previously because her version was new to me, which gave it a particular appeal - but having listened again, it
does lack dynamics - so finally, my preference is Cilla. Don't know if your polling system allows for second thoughts Roy...?
... but at least the world and Cilla know how I feel, and that's what counts