I'm personally not really able to see immediately who made a photograph, unless I already know it from studying.
But, honestly, I've always been a bit allergic to the word 'style', because to me it becomes one of those things that photographers try to accomplish, to 'create' a style for themselves and not be patient enough to simply let it evolve. That, I think, can be a great distraction, and maybe even a source of disappointment, because they try so hard to comply with their 'style'.
To me it's better to just not worry about style, work those prints, and if we work hard and look within ourselves to find out what we want our work to come across like, that 'style' will simply come naturally.
Some photographers I think have a real mark on the photography world, though, like H. Cartier-Bresson, P. Strand, A. Adams, whose work is pretty unmistakable. They practiced a bit, didn't they?
"Often moments come looking for us". - Robert Frank
"Make good art!" - Neil Gaiman
"...the heart and mind are the true lens of the camera". - Yousuf Karsh
i can recognize some things but there is a deep well when it comes to photography
here on apug, i recognize some folks like eddie, just from the thumbnail
but from time to time they throw a curveball and i show myself how clueless i really am
Seems we can almost ALWAYS can tell a jnanian image, though!
The Twilight Zone feeling always gives you away, John.