If the question is being taken literally, I'd rather be falling face down and knowing when the ground would hit me, so I could brace myself for it. I've always been this way; I've never looked away when doctors were putting needles in my arm or anything like that. I always have to look, I always have to know so I'm prepared.
But the essence of the question... in the grand scheme of things, I'd prefer not to know when I'm going to die. I'd rather just live life as it comes and hope that my death won't be for a very, very long time.