Some people defintely have one. Know their stuff or their copiers with almost instant recognition. Ernst Haas, Pete Turner, Henri Cartier-Bresson, even Ansel Adams(LOL).
Is it something to strive for?
Something that will develop as you become "good?"
Something that some people will never attain?
Some people, consciously or unconsciously, start by copying some one whose work they admire, as a bridge to their own perhaps.
George Parkin in picturecorrect.com has some thoughts on how to do it here:
http://www.picturecorrect.com/tips/how-to-establish-your-photographic-style.
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