I can raise my hand for the feeling like a fraud thing too... it has been interesting to see that others feel the same way. I have even asked my parents if anything else happened to me during my childhood that I don't remember because I have those days when I just think "get over it already, you have friends that have had worse and they seem to be getting alone just fine!" Then again, the more I learn about PTSD and psychology itself, the more I realize that one, a lot of times those friends really aren't just fine and two, its pointless to compare traumas and reactions. I learned that one here. :0)

As for the therapy question, I see mine once every two weeks. I think this is about right for me because I need time to think through the session and try to apply the knowledge I have gained. The things my therapist suggests are usually things I can do outside of the office. I sort of view him as a guide. My progress is my own choice and he can direct and re-direct me as I travel that road. Its really hard and painful, but I trust the idea that it has to get worse before it gets better and I know that I have to do certain things and face certain fears if I want to live well.

How often do I think someone else should see a therapist? I can't really answer that... it really depends on where you are in your process, how much effort you are willing make on your own, and how much you can take and use out of each session.