Even though the game seems well under way with development now...
I really like the day/night cycle and weather implement. Midnight Club LA (as an example) got the cycle duration pretty good; Slow enough to be subtle and gradual, but not so slow as you have to wait too much of your own real time to experience day or night.
It would also be good if by pressing some key (or at least a cheat code) the game could stay in that time (or go to actual real time speed) until you choose to activate time cycle again.
Does anybody here know if Hawaiian highways ever have those red and white reflector posts on either side of the road you may often find on rural roads with no street lights? Seeing those shine back the light off your headlights / high beams would look pretty good.