Playability
Competitiveness (can you compete with someone else easily)Difficulty level (can you comete against the computer, gradually get better)
Originality or Polished
Fond memories (well it helps if you liked it when you were younger)
Instant pick up and play factor (takes a second to get started and hours to stop playing)
All the above will make it stand the test of time, graphics, sound is irrelevent.
