Level Design: 5 (The best games ever made have something in common: stellar level design. This includes puzzles, hazards, secrets, and challenges, and is directly related to pacing, below)
Player Control: 5 (Video games are defined by the ability for the player to engage with the game's programming; without player control, it's just video)
Graphics Technology: 3 (These are video games, so graphics matter. But as long as the graphics, frame rate, and physics are serviceable, I'm happy)
Art Direction: 3 (A cohesive art style has a way of bringing a game to life and bestowing it with a visual identity)
Music: 2 (Music can evoke the right mood and atmosphere, but it's tangential to video game greatness)
Sound Effects: 1 (Great sound design can add texture and flavor to video games, but, again, it's something that can be done without)
Story and Lore: 1 (A good story and mythology can frame and inform a great video game, but some of the best games of all time are devoid of narrative)
World Building: 4 (A living, breathing world with clearly-defined rules goes a long way to immerse the player in the game and provide plenty of meaningful interactions)
Game Pacing: 4 (A poorly paced game is a serious problem; players need to be regularly challenged and surprised by involving gameplay scenarios)
Game Length: 2 (Two Worlds can last hundreds of hours, yet it's a mediocre game; Ico can be beaten in an afternoon, yet it's a masterpiece)
I've bolded the sections that are most essential in terms of gameplay, in my mind the single most important feature in a video game.
