http://www.artofvideogames.org/At this website, you can vote for which games will go into a Smithsonian exhibit about video game design! I voted for all the Nintendo games.
Be careful! You can only choose one game per genre per console. There are some really hard decisions, like Ocarina of Time vs. Majora's Mask vs. Paper Mario, or Fire Emblem: Path of Radiance vs. Pikmin 2, Twilight Princess vs. Super Paper Mario, Super Mario Galaxy 2 vs. Metroid Prime, etc...
Really, you should vote for which one actually has the best graphics and stuff in your opinion... but Nintendo is always great...