Cars. I wish to see cars.

Realistic engine noises. I know it sounds childish but GT5 sounded shit in comparison to Forza 4.
Realistic physics. There'll be no problem here.
Less of a loungy-feel to the game. If you put on GT5 you feel like you're in a wine-tasting room or someshit.
Less shitty detailed cars. For example I would rather see 400 high detailed cars over 2000 shitty ones.
More realistic modifications and more modifications in general. Things like motor swaps and such.

Every car having Premium View.
Better crashing physics.
Add Street Bikes. (MOTO GP)
Better dirt racing.
Also Better engine noises.

Better engine noise
F1 Cars
Newer Cars
More Tracks, more good tracks like hockenheim (new and old)(germany) and other f1 tracks (yas marina circuit for example)
then i will be happy ^^

I think adding motorcycles and street bikes would be cool but I don't think they would. I'd also like all cars to have premium view. maybe more modifications?

I think so, the will not do this
its a sim for street cars and racings CARS.
you know, you can play bikes in burnout paradise, moto gp an sbk ^^

engine swaps and customizable bov's

In all honesty the only extra feature I would like to see is the availability to add custom vehicle liveries/decals.

I'd also love to see the Citroen Saxo VTR or VTS :p

All I care about it drifting.