The issue with collecting 1000 cars is the simple act of buying the cars...
Once I started earning a fair amount of credits I started buying the thre most expensive cars in the UCD. After a while it began to be rare that cars that I didn't own showed up. I now buy expensive duplicate cars from the various dealerships when I get close to 20 million credits. I now have over 1400 cars.
I now have to spend time cleaning out "items" such as horns, helmets and suits so I can collect more cars. I don't collect any horns and eliminate duplicates in helmets and suits.
Hopefully GT6 comes along before I have 7000 cars and I have to start eliminating duplicate cars.
Yeah, the process of actually buying cars is very, very frustrating... simply the amount of time it takes. If you could have just ticked the 20 cars in the UCD you didn't have, and buy them all at the same time it would have been a load better!
Without the help of my friends it would ahve taken much longer to tick off the final 30 or so as it got to the stage that I was cycling the UCL 5 or 6 times and nothing new woud appear.
Like you, I have a lot of cars now... I think I have c.1,350, at least one of every version, and multiples of anything interesting, including all the 20 mill cars and all the LMP's... but I only really drive a small group of cars regularly and run seasonal TT's
Anyhow, finally managed to get the Air of Experience at 12.16am last night, and the Platinum trophy is now complete
I'm now starting to feel a strange compulsion to get to 100% completion too... I didn't feel this before getting the Platinum
Given the latest Seasonals don't look interesting (I'm no fan of 4WD cars or running on snow), I may take the next couple of weeks off TT's and run through the final 3 A spec enduros I've not run yet.
Oh, and make sure you register your achievement here...
https://www.gtplanet.net/forum/showthread.php?t=161901