I'm not sure what other people have experienced but on my Barb all the way to 60 and now my Wizard up to 42, I have yet to pick up a single usable, level appropriate weapon. Considering the effectiveness of your entire character is based on weapon dps, having a crap weapon means you character will be crap, simple as that. So to remedy that I've been forced to purchase new weapons on the AH at regular level intervals in order to progress at a steady state.
I'd talk about the poor/boring itemization but I've run out of juice. So maybe later.