obscure in their own way

The authors I most love are obscure in different senses of that word.

against artifice

The poets I most admire need no artifice.

[The language itself being a necessary artifice.]

human document

I most admire those writers who lived to write.

[Thinking of Jim Harrison.]

never mine

The poem you admire because you wish you’d written it. The poem you admire because you know you never could’ve written it.