Yeah, this kind of sounds like you are insinuating that fans just pick a guy at random to cheer for, just for the hell of it. Which isn't the case. A "project" for the fans? I know it's fun to try to pretend that everyone who disagrees with you has a less valid basis for their opinion than you, but assume for a second that people simply have different tastes, and stop trying to find flaws in their reasoning for liking who they like. Posts like this are making this situation far more antagonistic than it needs to be.
People genuinely like Daniel Bryan, which should be blatantly obvious by now. As opposed to some guy who won the genetic lottery and was guaranteed a fast-track to the main event, Daniel Bryan is a hard worker who busted his ass to get where he is, and proved all his critics wrong along the way. We can see the guy butting his head against the glass ceiling week after week, and he's doing it by literally stealing the show from performers who have all the support in the world from management. Overcoming office politics and favoritism through hard work alone? That's something that the average person can identify with and get behind. I'd also say that this generation of wrestling fans (this generation of media consumers, actually) identifies more with guys like Punk and Bryan than with guys like Batista and Cena, but that's a bigger argument for another time.
As for fans turning on CM Punk....who, exactly? Some people on these forums post their dislike for Punk, but can you prove that they are the exact same people who were previously supporting him? I think there's a tendency to cherry pick opinions from individual fans online and suggest that they are representative of the entire 'IWC'. Well I like CM Punk, and I always have. I don't think he's as good a face as a heel, but that's another matter. And it also raises another point. That being that performers entertainment value can fluctuate throughout their career based on what role they are playing, their physical health, and various other factors. Liking a guy at the top of his game, and then getting sick of seeing him when he's broken and worn down, or injured, or playing a different role, or has lost his passion for the business (and I'm not saying any of those things apply to CM Punk), isn't being fickle. Fans can only judge a performer within the present context.
Likewise, growing sick of a performer if they become legitimately over-saturated and stale doesn't somehow make you fickle if you rooted for them when they were fresh and interesting. ALL wrestlers will become stale eventually, especially with the amount of WWE content now on the air. Cena is stale. Orton is stale. Batista is stale. HHH is stale. The very real possibility that this will also be true of Daniel Bryan down the road is no reason to dislike him now. Realistically, it will happen to Reigns, it will happen to Wyatt, and it will happen to Bryan. The WWE simply doesn't provide fresh content as quickly as fans demand it. And yet, there's no reason to believe that either of them can't provide solid, fresh entertainment for at least as long as past performers have.
Finally, in regards to Zack Ryder and Dolph Ziggler, first of all both have been buried so deep that many fans simply gave up supporting them as vocally, as they felt it wasn't worth the effort. That doesn't necessarily mean they no longer like them. Are you going to invest interest in a red-shirt on Star-Trek when you know there isn't a chance in hell that they are making it out of the episode alive? Probably not. Second, neither of those performers is Daniel Bryan. You're failing to consider that there is actually an objective difference in quality between them, simply because you've lumped them all into the same category, when realistically they are in three different tiers of ability. That the WWE hasn't been able to cool Bryan down at all (although to be fair, I don't believe they've actually tried to bury him, just cool him down, as opposed to Ryder and Dolph) without success, says something about that difference in quality.
All that being said, who to support next? Well, why bother supporting anyone? The WWE is a glorified T-shirt company, and it's now blatantly obvious that fan reaction will have little to no impact on creative direction. Cheering for your favorite wrestler is literally more pointless than cheering for your favorite sports team, as at least there's an off-chance that the rampant cheers of fans can inspire a team to greatness. The only thing that will lead to greatness in the WWE is T-shirt sales (EDIT: ...and sucking up to the right people).