I'm placed between the two of you here...
Most of my favourite games are from an era when the graphics were pretty poor, certainly not realistic (anyone remember spy vs spy?

)
However most of those games had great gameplay, the Geoff Crammond f1 games for example were graphically bereft, but that didn't matter because the actual gameplay was realistic even if the graphics weren't.
Sadly GT's gameplay is completely disconnected from reality and is nothing like real world racing. The AI is terrible, the events are terrible. GT has been relying on it's graphics for years & the introduction of standards to GT5 and since, has utterly diminished their one main advantage over the competition.