The hardest part of character creation for RPGs is giving your character flaws. Because you're playing the hero, you tend to make them super duper awesome and wonderful and Mary Sue-ish, with only a little off-note irrelevant character flaw like "she doesn't like peas" or something like that. Try giving your character real major character flaws and see how you and her react to that. She's a stuck up rich girl who thinks poor people smell. She thinks dwarves are ugly. She distrusts elves because they're either servants or thieves. She hates all mages indiscriminately, even when they're innocent. She hates all templars indiscriminately, even when they're right. She's too emotional, makes a mountain of drama out of every little criticism, and can't stand to be talked back by her advisors. She has a messiah complex and believes her own hype too much, thinking herself the next coming of Andraste. I don't know, anything. Just try giving her a really ugly side to balance out everything else about her that's great (and should be, otherwise what kind of hero would that be, right?), and see if that doesn't instantly make your character a lot more multi-dimensional, more complex to for even yourself to deal with without falling comfortably on the easiest patterns every time.
Let us know how she progresses, I do love hearing about other people's characters. 
That's actually one of the reasons I always do the first playthrough of a BioWare games as myself. Because, like you said, (for me) it's all to easy to pick decisions that are deemed "good", "best", "moral", "inoffensive", take the easy way out and be a Mary Sue because we don't wanna risk getting our companions killed or having them hate us etc, especially when you're new to the game.
By playing as myself with a character that looks as much like me as possible I'm literally forced to pick options and take actions that I'd make if I were in that situation myself (within the games limitations, obviously) which always makes that first time more memorable because things go wrong, you make bad choices and your character becomes as realistic and "human" as you are.
I highly recommend doing a self insert during the first playthrough of a BioWare game, it's surprising just how raw and emotional the game feels when it's literally you hitting those big impactful moments in-game. I've learnt some really interesting home truths playing like that.