I have finally...
finally begun to play a few other games I bought, one at a time. Oh, and when Forza 4 came out, I played that for a few frustrating days in a row. Something about that game and me just don't connect.
But GT5? I can - and have - spent countless days just in Arcade Mode racing various tracks and saving replays for Photo Mode, where the only reward is the racing. As others have discovered, racing on the Nurburgring and watching daytime slip into darkness, and with rain, is the most AMAZING experience I've ever had in a racing game. And man, all those cars... it's my mission now to buy every single one, and eventually race them, though for now, I really need a car with at least 150hp. I need some excitement besides the cool visuals.
I can't say enough about GT5. I'll be playing it until GT6 comes, or the Lord. And by all means, you have to get hold of a good wheel, like the DFGT at least. If you don't have one, you're not experiencing the real Gran Turismo 5.