As my inventory filled up with 16dps flamberge's that no one in their right mind would buy, my last thought was how attached I was to what was being created
Flamberge's only cost 1700 gold to create (700 to make, 1000 for the 9 subtle essences), so I can't imagine what I'll be feeling when the item I'm creating is tens or hundreds of thousands of gold per go and I get duds.
Selling anything (other than Gold) in the auction house is going to be a crap shoot. For some reason the business/economics/finance/etc major (need to make that decision quick unless I want a standard BBA) in me wants to at least pay for the game while playing it, now that it's a possibility.
Edit: As a little experiment, I bought like 200 subtle essence and decided to make nothing but Flamberge's. Out of the 25 or so I made, I got roughly 80% 16dps junk (the lowest they can be is 16), maybe 15% stuff in the 18-18.9 range, and 5% in the 19-19.8 range. I didn't get a single one that topped 20 DPS. It seems like no one buys the ones that go below 19, so I essentially got 95% junk for my efforts. The 5% that wasn't junk may pay for the material costs or it may not. In any case, if you don't get really lucky and land on one with good stats, you may not pay back the material costs.
Buyer beware when the retail version hits and you'll be able to buy crafting supplies with real money. I advise thinking long and hard about the math before doing it. (This PSA isn't for anyone in particular).
I hope Blizzard keeps extensive data on auctions that have taken place and is willing to put that data out. It would be fascinating to see the price of gold (for instance) over time, and whether it fluctuated depending on the day of the week, hour, etc. It would also make it a lot easier for people to figure out how much their items are worth, compared to the system as it existed when I left Diablo II "Well, that's worth one...maybe one and a half Stones of Jordan"