Hi , my opinion for a good game :
1-st place is the game play! If it is interesting enough it can distract you from the texturing , details & all other stuff that the person wont like. Maby adding some cans that can be shooted at,some glasses to break. If it is a 3-rd person , a good camera control , like Dungeon Siege...
2-nd is the story line. Some say short , other say long... A good story line isnt the shortest or the longest! Its the interesting one. It should have a conflict , like Diablo , when he returns to destroy the human kind , or like Freelancer , where the main character has to find out what happened with Freeport-7 & Why because it blows up in the beggining. And many other games...
3-rd is the graphics. With a good graphics you can acomplish something very close to reality if you have an eye for it.The graphics is at 1-st place if your game play isnt good enough. A good graphics can cover a small part of the story line too , if the story line isnt very interesting. The graphics form the atmosphere in the game , so if your story line isnt so good (Like in Alien Vs. Predator...just walking around & shooting aliens , and more and more of them come) but you want your game to be scarry(like Alien Vs. Predator) just make the levels & textures the way they should be to look scarry

Well , hope this helps , my opinion
