Absolutely. And it makes sense to want to stay with a particular style, if that's what you're comfortable with. But various things can be added or altered that don't change the overall idiom of the sig. Even techniques from tuts and such will help you do things that turn out totally different....and it doesn't have to change "you".
I'd say more, but I'm not professional enough to give exact advice on a lot of the sigs. But creativity, experimentation, and learning from others or from tuts will all help improve your form.