This was my GT5 List, but with limited time to edit here it is.
Add the ability to:
0. B Spec same make races, as well as race with cars from your garage only.
1. Create custom named garages with no quanity limits.
2. View and sort (filter) all cars at once, by any criteria,
3. See all cars from all dealers, used, and online in one place, and purchase mutiple cars at once using filters. This would make it easier to shop wisely, example, all cars I don't own, all cars that can be race modified
4. Perform tune ups and maintenance on more than one car at a time. Select all cars that need an oil change, then do it. Select all the cars you want slect part on and do it.
5. Remember various settings threw out the game, such as B-spec full track view.
6. Make all music optional, tired of the same tracks during tune ups and maintenance.
7. Have separate sound outputs for each diver in split screen.
8. LAN play - not everyone has or wants to play on-line, but loves to play head to head against friends in the same room. Not to mention future posible lack of support.
9. On-line race replays with save option! I have had some great races on-line and would have loved to have had them saved!
10. Track creator like Mod Nation Racers - To have the ability to layout the track just they way you want in GT5... speechless!
11. Game save data with user name suffix, so each user can back up their saves to the same flash drive.
12. !!!All Car Download PACK!!! - We Paid for collectors edition, over 1000 cars paid for and can't used them all. It's almost like false advertisement.
13. Increase the daily gift limit, so those of us who have more can share, especially when we win duplicate cars!
14. Allow purchasing of cars for a specific event directly from that events menu. Load times are long enough, it's frustrating trying to go out to the dealers remember what the requirements were then navigate back to the race.
15. Auto save and shutdown feature after B-spec races, so we can leave it unattended.
16. What's this 20mil cap? Come on loose it, so we hit 19,900,000 then win a race for 108,000 and loose the balance! not cool, or buy a car at 20,000,000 then have no money to spend on anything else like parts for other cars!
17. Endless paint and less limits on what apearances can be changed. More car appearance customizations, such as liveries, decals, white wall tires, stripes, body kits, custom plates.
18. Be able to put a deposit on a car in the online and used dealerships so you have a better chance of getting them.
19. Fix Gordan's flat mouth puppet talk video, it would be better just to hear him and not see that.
20. Narration of the car history would be nice
21. Make menu navigation more intuitive. It's kinda nuts that you go up to something by accident then try to go back down to where you were and you end up somewhere totally different!