you no doubt have been here before
reincarnating with same family members
in different genders and relations.

follow through on your hunches
overturning one stone after another
over to see what you discover

I cannot give a detailed response, but from what I've gathered,

• Yes, you made an agreement with ??? that you would come to Earth and purposley be brainwashed to forget everything you knew.
• Yes, we do create our our reality, and are fully responsible for everything we attract into our lives.
• With that said, the paradox is even unwanted circumstances, perhaps such as birth details (family origins, country you are born in...) may appear to be not of your choice in reality creation, but you actually selected those fine details whilst in non-physical form. In other words, when your memory was restored you decided how fun it would be to be placed in certain situations. So when you get a particular detail you consciously didn't enjoy, remember your Higher Mind may have been the chooser of that scene (may have, because, perhaps you could have created it consciously but are still in denial but are oblivious to your deniability)
• And yes, we did have a particular purpose, yet I wouldn't call it a purpose. I would simply call it a choice. You chose which set of circumstances to unviel into, and even at what rate you would remember things at I suppose. This is hence the reason why some are born into 3rd world countries and others have all the physical wealth they can imagine, or while some are exposed to reality creation ideas very early on, and others who have to struggle for decades to learn that you even can create reality.
• However, even if you do not decide to follow this little 'plan' or purpose you set up for yourself in non-physical, it is always in your hands about what you want to do in life. There is no glorious or shameful direction to take in life, so don't get upset if you don't feel your living your life's purpose. Even Bashar and Daryl Ankin (?spelling?) spoke the Daryl was pre-paved to be a channeler of Bashar, and that, I guess, was his purpose. Bashar, though, spoke the intelligence that he didn't have to channel, and to only channel if that was what he really desired. He could've gone off to be an astronaut and everything would've been ok.

But really, the most fun part of the movie Spiderman, for the audience and even Peter Parker, was in the discovery of his powers. Isn't the experience more delightful in discovering what powers you have? This discovering is just called re-membering. Because, as CWG states, you really are just "re-member (ing) to non physical acknowledgment."

Your questions are reminding me of one of my favorite novels - The Hundred Secret Senses by Amy Tan. I can't really explain why, as it will be a spoiler for you if you haven't read it. It is (to me) a very encouraging and beautiful story of family, spirit and reincarnation. It's very other-wordly and I highly recommend it. :) You may even find some answers there.

As to your own life, I am nowhere near qualified to offer guidance on this subect, but I did want to say that, whatever your truth turns out to be, those answers are already there, inside you. You can ask for help finding them from your higher self, or Source. Just relax and be open to what comes if you do. It's all good, it's all You, and there's nothing to be afraid of.

In any case, it is all just a framework for you to weave your own life's tapestry upon. A launching pad. This life is yours. You can be and do whatever you like. Of that I am sure. :)

Your question also reminds me of a favorite book "Same Soul, Many Bodies" by Brian L. Weiss, M.D. here is an excerpt from the book from his website.

Think of your soul as the string on a never ending band and this life you live now as just one more bead on this string.
peace