I just bought a new car to mix things up a little, I was getting a little bored of the Challenger so went and bought the BMW Z4. So much more fun and nimble, it's really brought the fun back into the game. It's a shame they didn't offer a few more cars when starting out, or even having more cars in the game.
I was the same. I was bored of my Skyline/Dodge/McLaren and now I have a Ford Focus, which is my main car for anything I can use it for including just driving around. It's great when your Focus flies past someone Ferrari or the like
