Sming,
I probably, with this post, made myself sound too much of a "suck it up and deal with it" kind of person, no? If I did, then I apologize as that wasn't my intent at all. It's my belief that we have a very strong chemical, neurological, biological or whatever'igical tendency towards anxiety, depersonalization, et al. It is something that is as much a part of us as someone with Diabetes having insulin problems. They can't get over it by thinking, just like we can't. However...
Each one of us is different -and it's very likely that the results of our differing issues give the same effects - namely, DP/DR. In my case, I see the biological predisposition as something that makes the situation right for DP, and then my mental actions as that which continues the cyclical, recursive nature of the disorder. I believe it's important to kind of combat the problem from both sides (I take Paxil, for example).
I have a lot of respect for CBT and REBT and what it has done for my life, but, it's not going to have the same effects on everyone, obviously. I believe it has prevented me from heading down the "rabbit hole" of destructive DP thoughts many times; I feel a twinge of discomfort from DP as opposed to outright fear more often than naught anymore. The rational thinking has a tendency to throw a rod in the spokes, so to speak. It's still there, though.....