Bleh, I have that voice big time, and it's turned up to 11 right now, since I'm querying and my first three rejections came back boom, boom, boom.
The humiliating thing is I'm (trying) to read a fantasy novel by a fairly popular author right now (repped by one of the agencies that gave me a quick "dear author"), and I think the writing is raw and klunky. Chock full of filter words (realized, knew, noticed, through, felt and so on when they aren't frigging necessary), awkward sentences and paragraphs (one where the pov character's name was used in each and every sentence).
The story's all right, and it's based on a really cool concept, but there are some raw spots there too, including one pov character who really doesn't seem to serve much purpose and has a rather dull story arc, and a really intriguing crisis with another main character that had me going for a bit (in spite of the awkward prose), but was completely resolved off camera.
I'm pretty sure that I (and many of my critting partners who are also experiencing the frustration shopping our work) write better than this published author. Which means that 1. I'm completely incapable of judging whether or not anyone (let alone me) is a decent writer. 2. All that work I do on craft, storytelling, characterization, and polishing my prose means absolutely zilch. It really is just about being in the right place at the right time with a concept whose time has come.
Sorry to coopt your brooding thread, but I'm certainly feeling broody and unsure of myself right now.