You are raising some very good questions , congratulations to you.
But what do you think any one would be able to reply to all of them , even some of them, as Every question would need background to explain so to make understandable.
But your query still has reply , you know where and what is that ?
If you donot know , then ,
Go to Blogs World of GS where GS people are Purely telling about theirselves , their activities and many things more.
At least My Blogs have some of your questions answered.