I own about 80 NES games, and there is still a few I wish I had. I think 100 would be closer to the essential set.
Although, I feel differently about other systems. I don't think I could name 50 n64 games. That essential set might be more like 25, for me.
I disagree. I prefer videos of games in development, followed by images. Words only, dev blogs, especially lengthy ones kind of bore me.
Also, music is nice.
I've done several of the nesdev compo mini games. Flappy Jack. Jammin Honey. Euchre. I made some Ninja Gaiden like games... Vigilante Ninja 1 + 2. I did some sound programming that made it on a few other games.