Because I'm this bored:
"Pirate" Shepard
Earthborn - Ruthless - Vanguard.
Nutshell: my personal favorite, Pirate is a brutal enforcer of the law. She sincerely wants to do the right thing, but her methods can be harsh and even rash at times. And she will also make allies with anyone useful and trustworthy enough to her, even if dangerous (people like her old gang, Aria, Morinth...). A good person at heart, just very calculating as well.
"Boss" Shepard
Colonist - Ruthless - Adept.
Nutshell: Bause is reckless and idealistic, overconfident with an inflated ego. He's a master of biotics and has made a career with an outstanding performance record. Leading up to ME3, Bause envisions himself as general of the galaxy, personally leading every alien and fleet he can to victory. Among allies include the krogan under Wreav while hoping for Mordin to cure the genophage, along with the geth (whom he rewrote at the heretic station). And he kept the Collector Base for good measure.
"Jerk" Shepard
Spacer - Ruthless - Engineer.
Nutshell: only goal of this career is to be the biggest **** possible.
"Whimp" Shepard
Spacer - Sole Survivor - Soldier.
Nutshell: Whimp is an unqualified military leader wrongly promoted through his career thanks to family ties and pure luck. Morally neutral, but his decisions are fear-motivated (rachni too scary, too afraid of Sovereign to save council, too afraid of krogan to save cure, TIM will help fight the Reapers with base....).
Raas Shepard
Earthborn - War Hero - Sentinel.
Nutshell: my canon, strictly principled and disciplinary. A soldier believing in speaking softly and carrying a big stick. Basically a paragon with renegade resolve.