I've been toying with the idea of selling mine and buying either a G8 or CTS-V. I feel bored with it until I get in and drive it. Then I fall in love all over again.
I've been driving a S197 since they first came out, purchasing a new 2005 V6 in Nov 2004. I've had the GT since Dec 2007 so I've been in one of these cars for a few years now. I just can't see myself getting rid of the car even though there are "faster" cars out there (cough cough 5.oh). I have an emotional attachment to this car.
Now I've been contemplating supercharging or putting a turbo on the car but I'm not sure if I want to handle the headaches that can possibly come with doing so. I also don't want to dump anymore money into it.
For now I'm keeping the car. It's paid for. I drive it every day to and from work, used to drive it 100 miles/day when I commuted for school. Only issue I've ever had with it is the alternator going out twice last year which was covered under warranty. Overall it has been a very dependable car, and that's what I appreciate about it.