I previously owned a '01 330i and I've had more fun and enjoyment with my '91 318is. From it's classic tight sports car ride on curvy roads to a high speed cruiser, I have a true gem. I've owned Mercedes, Triumphs, FIATs, as well as all types of American cars too. My 318is is very solid and well built and should last me another 100k miles (I purchased it in May of '05 with only 91k on the odometer). I recommend this car to anyone (young and old).
old school styling, M3 suspension/handling, huge sun roof, gas mileage (even at > 80mph speeds), ease of maintenance