Companies with money, but rehash games, innovate a bit. I think you can take the risk
Use some contrast between color, especially brown levels. Even if your game is suppose to be bad ass hardcore, It wouldn't hurt to give us a memorable sight (Bioshock, Half-Life, Halo)
Make more sky combat games
Stop making WWII games
Don't make games 'diverse' by simply adding mechanics, try to be somewhat original.
Fighting games, stop making us double tap the joystick to run (who walks in those?)
Fighting games, lower your tolerance in the time in which you must hit a button to preform a combo. (hit X then hit Square at either 0.99 seconds after or 1 second after otherwise the combo fails)
PC games, stop being jackass' about copyright