It is great to develop your sound and sonic signature, one that everybody recognises and as soon as they listen to your track, they know it is yours.
I think that being able to work on different genres and always ready to go outside your comfort zone is as important though. You learn about techniques and perspectives which you never thought about, and absorb knowledge that will expand your creativity and enhance your skills in your sweet spot as well.
That's why I love to make and produce library music.
Here are some recent published productions.