See, I was less impressed by GT5 from what I played. It felt like GT4 with a pretty new paint job, while Forza 3 grabbed me right from the start as something I liked. A little less sim, a little more arcade, but definitely not an arcade style racer. And then the customization.... drool.
I just love my first outing with the customization. Scizor Skyline FTMFW!
Simple and beautiful, plus I made the Scizor decals myself.