I would suggest that if you think you have a style, you don't. I don’t mean that about you personally.
i read the OP's question correctly.
there is more to 'style' than photographing
the same subjectmatter over and over again,
or photographing something within a project.
one can have the same 'style" whether they are photographing color nudes
in slot canyon, run down factory buildings or doing bromoils still lives on hand coated paper
using wet plate negatives, it isn't subject matter but something else.
it is the way the person with the camera sees the world, and photographs it
and presents it ... not what is being photographed. it doesn't develop
over night with the decision for a project, but it happens over a period of time.
the way style seems to be talked about is as if it is subject matter, or a project, but it isn't.
i pretty much agree 100% with clive.
Photography is just a craft. If you broaden your interest, participate more in all areas in your life, your limitations will lessen. If you're just caught up in a small world with narrow interest, you're just playing around with the machinery. Most photographer I admire have interest beyond photography. Deepen your view of the world and practice, practice your craft.
But I do make a conscience effort to avoid photographic clichés--whether or not I succeed is a different matter! It’s a non-issue for me; if a shot feels cheesy I won’t take it. What I lose sleep over are good shots I miss because I was too slow or too sloppy to do them justice.
A couple of years ago, I turned down an internship with a local portrait photographer because her work made my eyes bleed. I may not have the best taste in the world, but I definitely think some people are "aesthetically challenged"(that doesn’t mean they’re bad people or anything). She does have a successful business, and I don't, so who can say who's right and who's wrong?
I agree that style is not subject matter. I always thought that style was an interaction between who I am and the context that sourounds me. This interaction comes through the best, in my opinion, when I'm pushing myself well beyond my confort zone. In terms of randomness vs. deliberateness, photographs deliberately made in a series are more likely to show a "style" or who I am, particularly when the photographs are hard to make physically and/or emotionally. I use to walk out of the house, camera in hand, and just make pictures of anything I found interesting. In my case at least, not many of these were ever printed. Since about 4 years ago I only shoot in "projects", and as it turns out these are always very difficult projects. Either way, random or deliberate, it's all very pleasurable :)
I think this whole style thing is merely a marketing tool.
99% of styles were stolen from someone else anyway.
Some beginners say their out of focus poorly shot work is their style. It's not. It's a lack of expertise and craft.
Some people say their highly calculated work is their style. It's not it's their marketing plan.
Everyone has a way of working and seeing that is unique. Some people are good at it and some aren't. And most are a work in progress.
Anyone who is any good is evolving, and is, and always will be, excited about photography, and anyone doing the same shit over and over is not maintaining a style but instead stuck in a rut.
So forget about your style and let other people waste brain cells defining it. Just take pictures and let your mind in that instant take whatever moves you.
However if you are selling work, and a style is selling, by all means have at it, but don't limit yourself to doing just that.
Don't read your own press releases, because you know it's all bullshit.
But there is a style.
Why do I have a hard time seeing the difference between my vintage shots and my current work? Help me understand why the same thing that appealed to me decades ago, still appeals. I still take landscapes, and the shots taken at Little Sur come out looking like shots I took when I first visited the creek.
But to the OP, getting back to the topic... My current work (for example the six sheets I developed tonight) departs from the so-called style that keeps drawing me back. I add photojournalism, difficult to take photographs, but the stories must be told (bullying must stop, and photography is the strongest tool I have to strike with). And I added family chronicle photography, illogical if you know me well (I hate gardening and taking family Christmas pictures)... I cringe at cliché but shoot away anyway.
So don't stop when a shot is not your style... use the opportunity to expand.