I got two main Shepards, one male and one female.
My female Shepard was a thinly veiled reference to Samus, at least pre-Other M Samus. I name her Aran Shepard. Subtle, isn't it? I thought it was a good idea at the time back with ME1. That reference got a bit blurred by ME2 as I had picked Vanguard for her class in ME1. The "biotic class that can still shoot a gun" in my mind. Then ME2 gave Vanguards an insignificant little upgrade called Biotic Charge. And in ME3 it's even worse with Nova. Guns are just an accessory now. Trading an Assault Rifle for a Shotgun for a Pistol, which is only really there so she can point something menacingly at her foes without blowing them all up.
Ruthless to her foes, friendly towards her friends. Giving the morality system the finger and running perfect games despite never really committing to either side. I did keep one Samus-ish thing about her, though. If it's even slightly possible to blow up the enemy, she will. Sovereign, the Geth, the Collectors, the Batarians, and right at the bottom of her "Races I need to blow up" list is "Reapers".
At least the ending will give me that option. The starchild can talk all he wants about alternatives, Aran Shepard is already shooting at the red one. Blow up ALL the Reapers! And relays! And Geth! And EDI... oh. Sorry about that one, EDI, but you DID try to kill me once, so it's okay. Shepard wants big boom!
She may or may not have gone mad over the course of the games, haven't quite decided yet. Vanguards are a bit nutty by design...