It's hard to think of a videogame that is simply perfect or that matches exactly everything we would like to see in a videogame, I have a lot of things that I would add to my ideal videogame, I would like it to be an old-style RPG, something like the first final fantasy games but with a totally immersive world and a big enough map, with many character customization options, a world full of life and quests, a complex story and characters with a lot of charisma.
I even think I would introduce the option of forging romantic relationships between characters and much more, honestly I could blow my mind thinking about everything I would add to my ideal videogame, explain to me, what would you add to your ideal videogame or how would you like it to be?