I think much too much is made of this thing "style".
Somebody quoted Picasso earlier...Picasso sometimes worked with three or four different "styles" at the same time.
I suppose its something for photographers to think about, since what they do, of all mediums is dependant on reality, therefor a recognisable personal "look" is much less apparent in this particular medium than any other.
Listen, put three HCB picture's next to three Robert Doineau's and ask your neighbour if he can pick a style. He will raise his eyebrows nervously and say; "Black and white?"
Which is to say not that there isnt such a thing...you can conciously invent and work in a style or you can create a body of work that will exhibit a style that was unconcious. Either is perfectly valid. Its a particular language for understanding the pictures.
Cubism in painting is a good example. You dont unconciously suddenly start painting cubist paintings one saturday morning - the language was thought of before the pictures were made, so hence the style was consiously adopted.
Renoir changed his light fluttery style late in life to a more robust and drawing related style of painting - again he did it perfectly conciously after his reaction to viewing the Italian masters of the Rennaissance.
And again, the "impressionist" style that him and his mates invented (and then all abandoned except for Monet) came from a shorthand approach to painting - that was leapt on and explored perfectly deliberately, which has particular rules of its own, nutted out by the artists between themselves.
Sure, you could split heairs further and say that the impressionist style was a movement, rather, and within that you have renoirs light touch, Monets scrabbled poplar trees and Degas, deliberatly fashioned dancers, all of them individual styles of impressionism, but the point here is that comes becasue paintings is like handwriting. Photography is not like handwriting.
The point is that the impressionist "style" has rules and was conciously constructed.
You want a style? Dammit go and make one then. Theres nothing stopping you. Different projects may have different styles. We have Ernst Haas with his swirly bullfights and so forth...
Style may or may not be technique related. If yours is and you really love them fisheye lenses (or whatever) so what as well, everything is up fro grabs as long as it works - remembering of all things that photography paradoxically to my mind is the most limited of mediums for artistic expression by its very nature, and yet also extremely powerful within its narrow scope - both because it reflects reality.
An unconcious style will be apparent if you think about what you are doing with your photography a lot, if you take it seriously. Other consious styles may be created by your thinking.
Too much is made of this thing style as if its a desireable will o the whisp that many are chasing. Go and make one then. At least you may get some interesting photographs out of the attempt.
Here endeth the Highway lecture on style. You may join me for tea in the lobby.