Nothing.
Handles like a small car, very nimble.
Very responsive for a 4 cylinder engine. Could use more power for hills, but the new 6 cylinder in the 2006 should remedy that.
With the removable rear seats it has tons of room in back. I go backpacking with friends and we can get all our gear in the back with removing only one seat.
Gas mileage is excellent.
I have 40,000 totally trouble free miles on this car.
I must disagree with the "excellent fuel mileage" bit. I own a RAV4 AWD and the fuel economy is anything but excellent.