These games, from a gameplay perspective, have gone off in the total opposite direction of what they were when I still had fun with them. PS2 era had technical limitations, but was far more enjoyable with its stories and fighting. The N64 ones by AKI (or whoever the dev was) can't be topped in terms of the wrestling.
It used to be PGR2, but it's become Forza 5. Nothing is wrong with that, per se, it's just they are making a different product for the same audience. I don't find it deep as much as clunky and trying too hard to be a simulation of something that's all about fun and energy. It's like reading a text book to learn how to socialize, it doesn't mesh.