Sadly in the RP world, same as the world we live in now, the best way to "fit in" is to be common. The best way to stick out like a sore thumb? Be uncommon, elaborate.
But remember, common does not mean boring. Work WITH the lore we're given. Use your chosen race's traits, use the cities we know and are familiar with, use the religious aspect of the game, have fun with those aspects, etc.. Your character can be interesting and unique without bending the lore, having ties with someone in the storyline, and such. Having a personality, with both faults and strengths stemming from a character's experiences (written history and RP), is the most important thing to me and something I enjoy most in other characters.
You could have the coolest, best written, most involved backstory in the world, but if I RP with you and your character seems lifeless outside of when they're talking about their story, I don't want to RP with you. So then, what's the point of the backstory?