If you pressed the red button you would spend every single day the rest of your life asking yourself "what if"?
Every single time you would want to go on a nice vacation you cant afford. Every time you would want a new car.
If I pressed the green button and lost I could at least live with my choice.
Sure I would say to myself that million would have been nice but it would not be something that would haunt me for the rest of my life.
If I pressed green and lost, every time I ever ran into any sort of financial hardship I'd be pissed. Even just something like I wished I had a nicer car or could upgrade my plane tickets to first class but wanted to save the coin. Little shit would bother me knowing I threw away a milly.
That said I press green, but if I lost it sure would haunt me.
Like PatsFan said, the interesting topic becomes what # on green changes your choice to red. If green was 10 mil I'd have a tough choice on my hands. Less I'm hitting red and more I'm hitting green.