In what aspect it should be improved?. It's to be noticed that the AI isn't the same for every event.

During the Extreme events and Endurance events, i've seen some of the best examples of race AI in any simulator, especially in the NASCAR event, where they use drafting in very creative ways, even going out of the way to draft behind cars that purportedly break out of the optimal racing line. 

I've also encountered some very creative over-taking. In the Super GT cup, racing with a MOBIL NSX, I had an A.I Garaiya JGTC car brake much too late into the spoon to get out much faster than my car and then after he overtook me, he defended the place instead of continuing to follow the optimal race line.

But in contrast, there are events where the A.I is virtually non-existent. Licenses and Special Events that make you go from last to first place in one-two laps have scripted, tank-like A.I, with the added aggravation of the immediate disqualification should any forceful contact happen between your car and the A.I cars, even if it's the A.I car contacting you from behind are the prime example of this.

Part of my hate of the AI is license tests/special events where they get in your way and cause a collision which makes me fail the event. I've literally been hit from the side by an AI driver and I "failed" the challenge.

Also during regular events they get in your way and cause you to spin out frequently.

I can live with both of those things though, but the most annoying thing of all about the AI is B-Spec. My driver is an absolute retard. I'm only level 7 or 8 in B-Spec (22 in A-Spec) so maybe your driver gets better, but right now he is an absolute idiot. He refuses to overtake other drivers on turns, instead of going around another car he'll slam into the back of it, and stuff like that.

Nice review.  Really hits home the difference between viewing a title as a game or as a simulator - which I don't personally believe are the same thing.

GT5 represents the closest yet the PD team have come to realising a vision of a simulator on a console, and it that's what you're looking for then right now that what it represents on a console.

Speaking of which, after taking a diversion to finish off AC:Brotherhood I need to get back into this.

Speaking of that - has anyone got headtracking working well?  I had a quick try but iffy results.  Haven't had time to look up best settings, etc. and wonder if anyone has any advice in this area yet.

The events in which the A.I. frustrates me the most is during the NASCAR events.

They make my car spin so often, it's a miracle my controller hasn't yet been thrown into a wall.  It's seriously testing my patience at times. ^^,

I have noticed that the A.I. is different depending on the events.  During License test and Special Events, it is a bit obvious to me that the A.I. is fixed to tank mode so that YOU learn how to avoid contact with them while finding the optimal route.  By having the A.I. follow a fixed pattern, it makes it easier for the actual test to be focused on particular elements that couldn't be achieved if it was always adapting to you.  

While during some other A Spec events, the A.I. will be different depending on the level you're in, or something like that.  The A.I. is overall more robust and smart during the higher level events.

I share your B-Spec pains...that's one of the things that's keeping me from investing more time into it (that and my "obsession" with unlocking the X1 )

I rarely ever dare to push him or to have him overtake. Even with Racing Soft tyres and a seriously over-powered car, he looks like an idiot on an ice ring >_>.

The events in which the A.I. frustrates me the most is during the NASCAR events.

They make my car spin so often, it's a miracle my controller hasn't yet been thrown into a wall.  It's seriously testing my patience at times. ^^,

I have noticed that the A.I. is different depending on the events.  During License test and Special Events, it is a bit obvious to me that the A.I. is fixed to tank mode so that YOU learn how to avoid contact with them while finding the optimal route.  By having the A.I. follow a fixed pattern, it makes it easier for the actual test to be focused on particular elements that couldn't be achieved if it was always adapting to you.  

While during some other A Spec events, the A.I. will be different depending on the level you're in, or something like that.  The A.I. is overall more robust and smart during the higher level events.

I share your B-Spec pains...that's one of the things that's keeping me from investing more time into it (that and my "obsession" with unlocking the X1 )

I rarely ever dare to push him or to have him overtake. Even with Racing Soft tyres and a seriously over-powered car, he looks like an idiot on an ice ring >_>.