What a fabulous small car! I have enjoyed driving this car for 11 years now, and it's still going strong. The fuel efficiency is outstanding. I have and never done anything other than routine maintenance on this car (which I purchased new), and it now has 195,000 miles on it. I recently test drove some new cars, and my 98 Toyota actually drove better than some of them!
Fuel efficiency, durability, reliability and it's fun to drive (I'm 5'6").
Improved cupholders would be good -- had several Pepsi Cola's fall in the floor. (Of course, but this is minor compared to all you get.)