I play gt5 like if I had finished the game,I don't play A-SPEC,B-SPEC, the only thing I do is seasonal events just for the money.
I only pick a premium car,Have 182,only 'cause seasonal events,and do a lap or something in nurburgring or any other track just for the graphics.I sit 9 feet from my TV,It's HD,so I get nice graphics,(SD is bad),lights off in my room,totally dark,only the tv is the light,I get more focused.
I will play A-SPEC AND SPECIAL EVENTS & LICENSES,only when I get a G27 or DFGT,i will keep playing like that until my dying days on the dualshock 3