I'm pretty sure it all depends on what you prefer, its a mental thing more than anything. I only started recently, on a Ride camber board. I was pretty crap at the time but didn't like that board much, then got a rocker and loved it.
Rockers are a lot more playful, always wanting to turn so I find them to switch edges really quickly. I also seem to find way more edge grip on a rocker, but that could be the magna-traction?
I've got a TRS now, not had any problems with stability (but it does turn so easily you can trip yourself up), couldn't be happier with it. But I never really spent much time on camber boards...