Our character is something that we need to constantly work on and develop. I have this saying "habits make you", so whatever it is that you do on a daily basis, will create the character that you are playing, from little habits to daily actions. You don't need to make it more complicated than that, just do things that force you out of your comfort zone, and push you to grow, and your character will develop in a positive way. Don't let comfort of a girlfriend, safe job, and all that bullshit drag you into the mindset that "you've grown enough" and now you can relax, because that is never the truth. You'll sink into that comfort, until you're once again back at 0, needing to start ALL OVER again, which is a B*TCH.