GRID racing has some nice eye candy for car racing, but I find it to be very unforgiving if you make the slightest mistake.
GRID isn't that unforgiving. It just has a steep learning curve when you first play it. Once you have a few races behind you on the lower difficulty level, you can ramp it up and play for a much more challenging drive. The ability to flash rewind and play before an error also helps, but this is a restricted feature and I have found that more often than not, after restarting the car has a habit of veering left or right at the second you restart, meaning you have to be really careful.
That said GRID is a cracking little racer.
Crysis is a PC killer for benchmarking and has great visuals, but the story is short and ho-hum, and it requires some ingenuity in using your special abilities to get through the game. Some have found it difficult / boring.
Crysis wasn't that hard to be honest, aside from the final level where it got a little more tedious than anything to kill the final boss. Far Cry 2 is a much much much more tedious game (albeit a great looking one).
Dead Space has been reported to be a very nice game - just not on the PC because of the control system which is better suited to the consoles.
Fallout 3 has been reported to bo th be quite buggy, and installs a lot of hidden drivers/drm on your system, which can end up making it very unstable. This is one of those times where the game is best bought via Steam (which has none of the DVD DRM related issues), or for a console.