My 2005 Cadillac STS is fun to drive. Its power is there when it is needed. It has a very quiet ride. It also has a roomy interior and easy access when getting in and out. The option of automatic or manual shifting also make it a blast to drive.
Heated seats and steering wheel are a real plus on cold mornings. The automatic or manual shifting. The BOSE stereo is great,
The keyless entry can be a real pain. The "No Fob Detected" warning can be extremely frustrating.