man, they need to make the cars fully customizable in GT4...not just the engine but the whole car...I want to be able to throw in racing seats and steering wheels and take out the backseats and install guages and roll cages, I want interchangable body kits I can throw on my car and different hoods and wings and lights and light bulbs and everything, I wanna be able to tell the difference between a stock ride height and a lowered car...I want the ultimate custom made car...
That combined with the current GT3 playing style will make GT4 the greatest game ever made...