Y'know, I kinda wish the rental cars in the TTs were just one color. Just black for instance. In other words, you only get to drive a nice livery or a color variant if you actually own it. If you use a rental, it's just black. That would be a fun way to kind of "show off" the cool variants you've collected. I always just use a rental myself even if I own the car in question, but if they were just black cars I'd definitely be inclined to go into my garage and use one of my own if I had a nice color variant. In fact, maybe the rentals should actually have "rental" stamped in red letters on the side! lol. Not that I think there's anything wrong with the rental option - I think its great actually - but it would just be a fun way to add value to the car collecting aspect of the game.