So let's hear some descriptions about your characters, without mentioning what "class" they would be.
Okay, I'll bite. I don't have a name in mind, so let's call him Urge for now:
Urge is a Dunmer mercenary, he favours swords and light armor for mobility, and he has a taste for destruction magic to both surprise and terrorize his enemies and impress the ladies (They like shiny things right?). He's cynical, snarky and at times rather condescending, but he's not a complete dike to everyone he meets, he knows the value of having friends and reliable contacts, as a Mercenary that's a great way to get work. Urge is all about effieciency, he always gets the job done, and does whatever it takes to do it. Morals mean nothing to Urge, as long as the pay is good enough or he deems something absolutely necessary that society would condemn, he will do it without hesitation, allthough he'll carefully consider his actions and their repercussions, if it costs him too much then he'll find another way, but if there's only one viable option the the consequences be damned. Allthough he will try to do the "right" thing whenever possible, he's a pragmatist and an oppurtunist at heart.
I see Urge as an experienced Mercenary, someone who has seen the world and killed people for money all over it, in addition to money he also highly values information. Information can be a powerfull tool, and gathering as much of it as possibly is something he's rather passionate about, his motto so to speak is "The more you know about your enemies, the easier it is to kill them. The more you know about your friends, the better prepared you are for when they inevitably stab you in the back." or something like that.
Seeing as you can customize bodies now, I'll try to cover appearance, though I don't know about hairstyles and stuff yet obviously. Urge is as mentioned a Dunmer, with dark gray skin, bright red eyes and medium length black hair (Something practical but still fancy looking). He's muscular but not too bulky and covered in old scars (If scars are an option I will fly to the US, find Bethesda's offices and hug a developer).
Urge has a taste for the finer things in life, namely ale, wine, ladies and the occasional Skooma.
I'm ot sure why he's in prison yet (You start as a prisoner according to GameInformer) but I reckon he actually deserved it, unlike many characters i hear of who were framed. Nah, i think he just stole from the wrong guy or killed a target that happened to have powerfull friends, it doesn't really matter, he's getting out to do it all again and save the world to boot. After all, if the world gets eaten by a giant dragon, there's not gonna be a whole lot of work, women or booze left.