I've changed my mind (not a huge surprise, knowing me)!
I originally wanted the basement stairs behind full walls and a door. I've recently decided, after some persuasion, to keep the staircase open with a railing. This way it'll look like another floor of the house, rather than a basement. Kind of like the way stairs going up seem inviting. I realize that sometime in the future this will mean a baby gate... but I am soo on board with this.