I bought the game yesterday but couldn't play until today due to the download time, which was really slow. Anyway, I have a lot of good things to say.
-No legendary dealership for cars with stupidly high prices
-The events aren't arranged in a stupid "world map"
-Championships aren't too long, but they aren't too short either
-No 2 lap races
-Physics are good and the cars behave predictably
-No Scapes
-No GT Auto
-No random factoids about things which don't relate to cars
-No crappy music which doesn't reflect the mood
-No Brand Central
-No "Museum" or "Channel" sections
-Fantastic car list with a lot of new, current and legendary vehicles
-AI aren't as pathetic as GT7's. Some do act strangely but that makes the racing more fun for me
-No rolling starts where the leader is 40 seconds ahead before you've started
-You can paint your car any colour you like before buying it
-Car sound quality is better than GT7
-You can adjust fuel load before the start of the race - something you can't do in GT7
-Track atmosphere is better than GT7, with plenty of spectators, tents, helicopters, blimps, etc
-You can earn money in free play
-Dynamic time and weather is available for every track
-Consistent penalties
-Car points aren't as problematic as I thought they would be
-Australian cars
-No microtranscations
-No fake concept cars
-No stupid class structure
-Not all gearboxes act the same way
-No dirt racing of any description
-No whimsical animations or corny sound effects
-Menus aren't a pain to navigate
-Free play modes are SEPARATE from career mode events
-Cars are really cheap
-Track selection is small but none of them are utter garbage
-No cafe or menu books to complete
-Lotus
Finally, a racing game that focuses on cars and racing without trying to be all things to all enthusiasts. Forza Motorsport knows what it is and doesn't have a host of stupid, superfluous features that are completely useless to the core gameplay. The car points system is the only thing that I'd consider questionable, but I wouldn't call it a deal breaker. Especially when you compare it to some of the awful design choices in GT7... And I haven't even got to the post-launch support. Gran Turismo 7 will need to a LOT to bring me back, probably more than they could reasonably be expected to do. Forza Motorsport has a lot of the modern cars that I want to drive, and a few legendary cars that GT7 STILL doesn't have. I'm going to stick with this game for a while.