There are so much cars in the game that deserve the premium treatment. I'm currently collecting the Le Mans prototypes in GT5. There are quite a lot of them in the game, but only about 3 different models. But there are more cars like the Veyron, which wasn't even in GT4 but is still a standard car.

There just isn't enough in the game.

Premium cars, preferably more contemporary cars or recent concept cars. Also, I'd like the Chromelines and Stealths, but not everyone likes losing the exclusivity.

17 cars? It's just a spec and livery edit. C'mon, make 1,000 cars 2,000!

Drag Racing

Just like the standard cars need some premium love, so too do the tracks!

I want to check new paint color on car, and wheel before i actually apply it.
GT5 just provide paint color on dummy model, but i really wanna check new color on real one in different environment, just like dealership menu.

Having the option of Fast Forward, Rewind, Slow-mo, and Hot Keys (Switching between cars in one click of a button).

Some of the biggest tracks are not on the game and there isn't much in my opinion, Spa, Silverstone, Donington, Paul ricard, Bahrain, Abu Dhabi, sao paulo, Budapest, Valencia, Also bring all the old tracks from previous games, I'm sure you guys can think of more.

I'd love the cars in GT5 to sound more ferocious.. Just to immerse us even further in driving.
Things like Vtec crossover roar, induction hiss, wilder engine sound on load and on tickover, more realistic exhaust backfire sounds.. These would make the game totally more enjoyable in my opinion.

Now its a game about Cars. I would love GT5 to be a Racing Simulator not only a driving game.

Having your A spec driver combining with your B spec drivers to race the endurance races. Maybe having a minimum % of a race for A spec driver. 1 driver never does 24 hrs in the car in real life.

Classic to current, or even the ability to add strips, etc. License plate editing was mentioned as an option years before the release, and I think it deserves more thought.

It's baffling that there isn't better, outright support for these well respected wheels/pedals/shifters.

Ive always wanted the option to freely and manually add sections and elevations to the track. And please more themes! =)

The reasonably priced cars (Kia Cee'D, Suzuki Liana, Chevrolet Lacetti) would be a nice inclusion as well as the actual camera views they use for the power laps.

Ability to skip or disable some animations and a customizable contextual shortcut menu.

You have the wheels modeled, now let me put them on whatever car I want. I'm tired of buying a car and HOPING I get a good wheel selection......