I agree, D.C., writers can have more than one style and take chances with their work, but if you can find what style/voice/category, whatever it is that works for you, then you can move in different directions while maintaining some consistency in your work. It’s an interesting thing to consider.

What style is used, IMHO, depends to large degree on the story being told.
– A gossipy celebrity bio is best presented in breathless, admiring, confidential tones.
– A detective mystery may come to life when told first person by the detective’s sidekick (e.g., Dr. Watson).
– A romance can be all the more romantic when we hear the emotion in the heroine’s own voice as she tells it.
– “Writing for Dummies” needs a more informal and tongue-in-cheek approach than “Raising Exotic Amphibians for Maximum Profit”.

I’ve read — and I expect you have, too — a number of books that were “good enough” but would have been so much better if told in a different voice or from a different point of view.

Besides, isn’t it rewarding, as well as entertaining, to limit yourself to one particular approach, perhaps the one with which you are initially least comfortable, but still have it turn out well?