You can't do it all--at least not well.
We've all heard the old adage; Jack of all trade, master of none. Well it is just as applicable to writing as it is to anything else. Your voice as a writer is something that is inherently a part of you. You developed it when you learned to speak as a toddler, and you can't change it. It is what it is, and that's it.
However, that's not to say you can't hone it, you can polish it, and takes steps to make it shine. And the biggest step you can take to make your voice stand out is find it the best possible genre to call home. The style of your voice will always lend itself more to certain genres than others, and finding the one that fits will take your wring to places it's never been before. Experiment with genre, find what you excel at and don't limit yourself with expectations or pride. Maybe you've always imagined yourself a thriller author, but your voice is suited more to women's fiction. Adapt. Be brave enough to make the switch, or better yet, combine and write thrillers geared towards women. And don't automatically think that you can write what you read. Sure, you may love romance, but reading every romance novel ever written won't help you write it convincingly if you don't have the voice for it. But that doesn't mean you have to give up. Keep reading romance while you write deep fantasy or horror.
Learning who you are as a writer can only happen if you remove all the walls and barriers holding you down, allowing yourself to float around for a little while, and seeing where you land. And when you know where your strengths lie, only then will those strengths allow you to branch out and grow.