Not DAI, but....this is silly but I'll share. 
In my first ever Mass Effect run last year I played a badass femShep. For every game I ever played in my life I was a polite, kind, good person trying to help everyone. For the first time with that Shep I tried being confident, blunt and willing to do bad things and be disliked (but still essentially good).
That experience gave me a little more confidence in real life, I'd think 'no, don't be a shrinking violet, what would femShep do?'
Seriously I need that written on a bracelet. 
It also taught me to role play, the world won't end if I do a terrible thing in a video game. Now I never play a totally good character, I never play myself. I make characters who fit in the world and all have different points of view, often not my own, and it's incredibly liberating to see the world through their eyes and watch them live through the consequences of their decisions, good and bad.