Hi and welcome, there have been alot of good ideas discused lately.
The highlights are, a ad&d style paladin with all the traits roleplayed out, an archer cursed with personal grief and strange luck.
Assassins and their reasons to commit the acts they do, a mystic archer ( Acadians class specialty ).
My personal ones are a Dunmer noble who is arogant and concieted, whose actions are self absorbed and lustfully perverse.
A Khajiit Ohmes raht who seeks redemption by testing her mettle in combat with blade and spell, while spending time wishing to be a chief and learning to cook.
Lately inspired by the paladin topic I created Anna the tiefling and modded some new aspects into my game, to reflect her base, dangerous, instictual, treacherous and chaotic background.
My advice would be to get inspired by a novel, character or film, or head to the wiki and read the ingame books to get a feel for an idea that you like.