Basically, there's two things I really REALLY want in GT5.
1. Drivetrain swaps like in Forza 2.
2. Dynamic weather for real tracks that takes the weather forecast and alters the weather accordingly, which might even happen since KY said he wants to put weather in and there's the thing on the home menu that shows you what the weather's like at Silverstone or Monza or Spa or whatever.
However, even if those two things weren't in the game, I'd still buy it. I think if they used engine sounds from GT3 and never bothered to update the Nürburgring's textures from GT4, replaced the tyre squeal with the sound of a chainsaw and didn't even bother with the dust that cars kicked up on rally stages since GT2, most people on this forum would still buy the game as long as they included the most realistic driving possible and a stupidly mind-killingly huge number of cars, even if they are all Skylines...
Well maybe not but as long as the number of cars, the models and the driving were as you'd expect for a next-gen console (and I'm pretty sure, from GT5p, that the last two are up to that standard), they don't need to include too much ancillary detail like tyre tracks, dirt and so on. I mean if they did, it wouldn't be long before people started complaining about how their sump didn't crack after that last jump, or how their head gasket is still fine despite the car running 3153163642 bar of boost... Ok maybe that's going a bit far and it would be nice to see detail like that (if it was optional), but either way I'm pretty sure GT5 will be good enough to be the best racing game on the PS3 and most likely better than the next Forza, even if it's just because of the variety of cars. I dunno though, I'm considering picking up a used Xbox just for Forza 2, just to play around with drivetrain swaps.
p.s. Aren't the choices on the poll a bit, i dunno, extreme? I wouldn't say GT has NEVER had ANY features but I also wouldn't say it'll have everything everyone wants included.
I might just go to bed instead actually