I recently came back to GT5 after the patch. Previously I had been playing Netkar Pro, iRacing and then more recently F1 2011, then the GT5 2.0 patch came out and I got back into it.
GT games are the kind of games I will play on and off for years, I played GT4 again last year (was playing with a pad then) before buying a wheel specifically ready for GT5, then got sucked into GTR2, Rfactor and iRacing while waiting for it to be released.