Your question confused me abit, do you mean how do we shape the sounds (EQ, effects...), or how to create the right atmosphere in a song for the style of the game it's going to be used in?
To answer the latter one, I usually do what seems obvious. Fast music for fast games like racing and arcade style games, slower music for slow games like RPG's. For FPS games it's more difficult since your situation vary alot. You will have to either find some good balance in pace or make 2 songs for each area, one fast for battles and one slower for exploring. That can also apply to RGP's.
For the sounds themselfes and the layout of the tracks, that is up to each and everyone to decide for themselfes. It's not what you have, but how you use it i say.
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