This is a question I got when I asked for topics to blog about back in this post.
Here are a few thoughts I would have on the topic.

Develop your own style first, be honest with yourself about who you are and what you like.
Yes, you’ll start out most likely coping your favorite photographer but really try to decide what elements you like and then build your own thing.
You want your clients to know you for your own personality and style, not just “anther one of those photographers”.
You want people to hire you for you and what you can bring to the shoot.
There are many many photographers but only one you and that’s what you can give that no one else can.
If you change your style every shoot, how will people define you and what will they know you by?
They’ll never know what they’re going to get and it will make them uneasy hiring you.
If your clients know what you do and how you shoot, I believe they’ll feel more confident.
When they decide they want a shoot in “your style” they’ll know exactly who to call.
If you’re making your clients feel comfortable and like they can be themselves, you will get their natural style to show through, they will feel like you really captured them as a person, but still in “your style”.
They are paying you to do your thing but make them feel comfortable enough to be themselves and let you capture the real them.
Of course as photographers we are constantly learning, the industry continually has new technology and  things to use, but you can still always have something people know you for.