I play with an Argonian assassin, whom I call Slither. He's pretty bad ass in my opinion. I've made him sort of the vigilante of Skyrim. I love role playing as him so much!
I like to pretend that he's been cursed with longevity (which would explain why he's in Oblivion and why I'll have a similar character in the upcoming sequel), but he puts it to good use, fighting against the denizens of the dark. He operates from the shadows, using a bow to take out his targets or a knife if he decides it's personal. He's not exactly the best sword fighter; I've had to pull some [censored] tricks to win before, but he's not bad. I just imagine him being rather arrogant when it comes to foes. Like, he won't admit when he's outmatched.
I remember I was doing the Dawnguard questline with him and when faced with the realization that he'd have to kill Harkon, he was cool and calm about it. He's not going to let anything deter him when it comes to fighting for good. He's not afraid of much, if anything. He's tactical. I'll make him case the joint he's about to attack (let's say it's a bandit camp), and then act accordingly.
I've outfitted him with the proper attire: the Nightingale bow, blade, and armor set with the exception of the hood. However bad ass, I make him wear the Shrouded Cowl so he's more proficient with his bow. I've focused mainly on stealth, and some melee combat. He's quick with a bow, but even quicker with a dagger. Twice as deadly if he's unseen.
I've got a whole back story too! He was outcasted from the Shadowscales because he broke the tennet of killing a fellow member. This was because he found the member to be planning on treason and could only stop him by slaying him. Before he was able to escape, he was cursed with immortality so that when he would eventually be caught, he'd face treason for his crimes. However, their planned backfired and he outlived the league. He now wanders Tamriel, fighting injustice and crime as the mysterious vigilante.