I got kaido battle, battle gear 3, initial D, D1GP and D1GP 2005, and I'm working on drift champ and cyber formula those 2 realy hard to get.
I used to like GT3 for drift but after I got D1GP 2005 I forgot all about GT3.
I also love enthusia, it is a great mix between GT3 drift abilities and GT4 driver feel and car phisics, the only part that sux about the game is that you got to play alot to unlock some of the fun cars.
kaido battle is cool, its borring at first bt it gets better as you get further into the game.
Battle gear 3 is good but kind of hard to get used to, and cuse its in Japanese I'm having a hard time guessing game modes and other other stuf.