100 questions eh? That`s new to me, care to clue me in?
As for my experience, when playing my first character is always me, the real me, tailored to fill a role in the party of course and as immersed as I can be. My problem is, I can never find good character motivation, it all seems to degrade into the endless cycle of get money to get more gear and training to run better missions. Though in part I blame that on my gms failing to be engaging or realistic.
When I run, I encourage my first time players to make themselves, not exact copies of them, but them as runners. It`s great for them getting into the setting without worrying too much about their ignorance of the setting.