I don't know much about Bryan's real-life character, but not many people can help but get frustrated when WWE doesn't allow you to perform at your best and I feel Daniel Bryan may be one of them.
I can't see Daniel Bryan becoming a world champion in WWE, well, not anytime soon.
He just doesn't fit the WWE mold and he just reminds me of the previous generation of stars who was constantly being in the mid-card scene whom fans wanted so much in the main event, (Matt Hardy, John Morrison, Christian, Shelton Benjamin, Carlito).
Perhaps I may be wrong, but Daniel Bryan hasn't got the look of the typical WWE main-eventer and one thing is sometimes what hampers you from mid-card to main events, don't believe me? Check out the list:
Shelton Benjamin (Mic skills were okay, in my opinion, but most felt he was quite bad.)
John Morrison (Same as Shelton.)
Carlito (was getting frustrated/angry at WWE misusing him).
Christian (Vince McMahon was rumored to not see main event potential in Christian.)