The personality test isn't about you, it's about whether you're a fit for the company and traits they are looking for, don't take it personally. If you got turned down, there's a better than average chance you may not have fit in and enjoyed the job anyway. Try not to over think it. I know a lot of really great people doing great at the Delta interview, only to be shot down by the shrink on day two.
Although I will say that the stories I hear about the hiring departments interaction with those getting turned down, makes me think there may be something to it.