What is the best....?

Penelope Cruz (I'd like to think).

why ask the question , if there is no definitive answer ?

No matter how subjective the criteria, no matter how unattainable the answer is, an answer must exist. Somewhere, something, without any qualifications, is in fact "the best”.

That said, if this was intended as a serious question instead of a "Tpreaves is bored” question, I would have expected to find it placed in the more appropriate “Best of" forum; in which case I would have said "bombs away" for daring to distract the deep thinkers who take on the challenge of answering the big questions in that forum.

"What an inane question. How long is a piece of string?"

That's an easy question to answer. When you say "how long is a piece of string", that limits you to 1 piece. Since you ask for no other variables with regards to the string, all you need to do is find a piece of string and measure it. Whatever your answer, thats how long a piece of string is.

Bacon.