Short form: I don't want flawless heroes. I just want heroes who are good.
Extrapolation: I just don't get into the whole disfunctional thing. I don't feel like I'm disfunctional, even though I have some pretty huge character flaws. I don't want a hero I can't identify with because he's got such a huge problem. I also think, if he's a hero, He'll over come whatever flaws he has. Sure, they can have major problems/insecurities/whatever, but they shouldn't be added just to be added, and if they're there, they have to be overcome. That's what a hero IS for me. Someone who overcomes his problems to help others.
Now, I've only read two of yours, (well, two and a half, I didn't care for White sands enough to bully a copy out of you, so I didn't finish), so I can't say so much. But both of them were really good. Dragonsteel had a 'flawed' hero, in the sense that he had a big problem that he couldn't face until the end of the book. Of course, the way it ended, it wasn't the end. It needed another book. Very little resolved.
With Way of Kings, well, no, I don't think I liked the end. It's ok to end sad, I guess, but everyone makes big decisions, some of them make self-sacrificing decisions, and well, it doesn't seem like the world in general is better off for it. It's like everyone who sacrificed did so for nothing. It was pretty pessimistic. The young hero (the guy with the jade) is flawless, but that's what makes me angry about him: I want him to selfishly hold on to the blade to fight on. it's his flawlessness that bothered me. I really like how Dalenor turned otu though. Able to rise above his selfish feelings at some points, but still glad when his feelings are gratified.
Don't get the wrong picture, incidentally, I liked it a lot. However, the ending, well... couldn't it have been a little, I dunno, less like the victory meant something other than "well, the world wasn't TOTALLY destroyed"
ANyway, I don't have any conclusions right now. Just thoughts. I liked both of those books, and neither one had a "perfect hero."