Nobuo Uematsu (Final Fantasy) does some great music, he's got a real talent for creating themes and emotional auras. Michael Giacchino (Medal of Honor) also does some great scores that comliment the atmosphere of the games brilliantly. Anyone who thinks video games music is simple needs to get their ears tested, even the old sonic themes had a good tune to em, they did their job. Classical themes were concieved often to acompany a particular opera or play, to compliment the visual, much as movie and video games music is. The question is, can you listen to a video game track and STILL visualise the scene, the atmosphere or the emotions that piece is conveying? If so, then it's done it's job. And most of the good composers can do that.