That sounds like a mature move.

I think my problem with the fills I'm attempting is I can see them playing out beautifully plot wise, I just don't think I have the right voice for the characters. So then I try to reason that I'm pushing myself and growing as a writer, when really I'm simply producing mediocre fics.

I'll keep poking and prodding at them for a bit, but you're definitely right that at some point, it's okay to step away. We'll see...