Exceptional handling. This car will "turn on a dime, and give you a nickle in change". High RPM powerband will quickly remind you if you are in the wrong gear. The five-speed manual trans is a must. If pure acceleration is your thing, then go for a Type-R model.
Larger diameter wheels. The stock 15" look too small on this car. I have used 16" with low profile tires and it vastly improves the appearance and also the handling, although the ride becomes a bit rougher because of the tires.
I've had my Integra for over a year, and I can honestly say, I've never owned a better car. The handling is superb, and I couldn't ask for better gas mileage. I drive a little over 300 miles a week or more, and being in this car is a pleasure. It's small enough to weave with and the engine is more than able to pull you out of tight spots when necessary. Bottom Line: You will get all that you've hoped you've paid for.
Engine responsiveness, gas economy, great handling, and smooth ride.
The sound system controls are farther away from the driver than I would like.