I have like... one NES game in the box. I was one of those fools who threw the stuff away. I think I still have a few things here and there in my closet, but no boxes that I recall.
I have like one Super Famicom game complete in box, and a Neo Geo Pocket Color game complete in box.
I actually have a lot of my GBA game boxes that I've been meaning to try and get back into somewhat display order. Sadly most of them are kinda squished flat. :/
It wasn't really until games were on discs that I began to really make sure the cases were kept in tact. I do have a nice number of Genesis games in those plastic cases though. Only because they were plastic cases and not boxes.
Yeah, I threw away a lot of the boxes too. My older brother is the only reason I have any of the boxes from the NES and SNES era. He managed to save his SNES box, though no styrofoam, a Starfox box, and that Dragon Warrior NES box. The rest of my boxed stuff is things I got later on when I started collecting.
I wish that I had kept the boxes, but most of them were at Christmas or Birthdays, so they probably go trashed fairly quickly. I am glad that the Genesis games came in those hard plastic shells.
I had to clean that Box a lot. You can see in the pics, it was dirty, and it took a lot of cleaning. It looks like it was in someone's attic for a few years. Still, It's on my shelf now with one of my NES' systems packed in it!