As a regular player of Gran Turismo series since the first part, I must say that GT6, considering its technical capabilities, disappointed. The single player mode is practically only a shadow of himself, after about 90% of the achievable single player points I have not found a racing series that I would like to play again (in spite reached maximum number of points). AI, if you want to designate the computer opponents so almost is still stupid as described in the previous parts of the series, compared to the previous but much more aggressive. Since the computer opponents draw as in previous games their rounds as if on rails, you will at Ausbremsmanövern or brakes of harassment desöfteren boxed off the track. Remedy is only one line option that cuts the Ideal Line of AI only in the fewest possible points.
The route selection of GT6 is fine, even if great distances like El Capitan from GT4 or the Special Strage Route 11 from GT3 still missing. The focus of GT6 was more put on real race tracks, so that's fine.
The long-term motivation of the game I put in single player mode strongly questioned because currently endurance races still missing entirely.
In sum compared to GT5 GT6 is a clear step backwards, improvements such as removing the used car dealer and revamping the graphics help only marginally.