The Client Profile is mainly missing server-side things, i.e. ASP.NET and the like. You can just develop for client profile and let the compiler handle the rest (you'll get warnings if you use something that is not available on client profile).
And if you can't do anything about it, switching to the full framework is just a click on a check box.
You only need . NET Framwork 3.5 features if you consider using LINQ and ADO.NET Entity Framework or the new System. Addin namespace.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.