I don't know if this has been suggested in another form already (read through the existing suggestions but couldn't really find what I was exactly thinking):
A garage with *discrete* cars, sort of like the way gran turismo 4 manages the garage (yes I mentioned GT). Meaning that each car you define would have its own setup/skin and persistent stats such as:
-total miles+laps driven (should have visible odometer in gauge cluster as well)
-perhaps $ in crash damage repaired
-date purchased
-# of tires used
-etc.
Of course it would not cost you anything to add another identical car to the garage like GT, it would just help organization-wise if you wanted a specific setup linked to a specific skin. It would not be unlike the players system used in LFS already, which defines player specific settings like controls/view and such per account. Other persistent info like millage and $spent on repairs/gas so far etc. would be entirely novelty (although I suppose they could be made to affect the car over time if desired).
I understand at least the persistent stats tracking is done, to some extent, in LFSW (miles driver and fuel burnt), although that requires an online presence (not that I think that is bad) and the stats are across the entire account and not distinguished between individual cars used. Heck, maybe the "garage" could be hosted on LFSW so that it can move with you should you reformat your computer or play at a friend's house. My suggestion was intended to make the LFS somewhat more "personal" rather than simply a staid driving sim "application".
I understand that this type of addition would be more "post-S3" but I thought of it now so I'm throwing it out
.
Sorry I couldn't be more concise - still working on my writing skills.