Your Voice. The Voice.
I imagine, for a singer, there are two aspects of voice: there’s ‘the voice’ – a study of what can be done, how to do things with the voice; and there’s ‘your voice’ – what you can do with your voice, the things your voice is capable of.
What suits your voice? What fits?
Perhaps that’s a more striking thing for a vocalist, and maybe less obvious for an instrumentalist. So, that might be a nice way of looking at studying other people. Don’t copy their voice. Extract ideas about what’s possible on the instrument, what’s possible with melody, harmony, rhythm and so on. But the voice is theirs.
Another way to say it:
The Voice belongs to everyone.
Your Voice is yours alone.