The Taurus is a screaming value. It simply rides and drives more "expensive" than it is. In addition, the level of standard equipment is impressive, considering the price. The 3.5 and 6 speed automatic work beautifully together. It is much smoother, more refined, quieter, and more powerful than the old Ford Five hundred.
Smooth, quiet ride, engine performance and smoothness, solidness of the body, build quality.
A telescoping steering wheel would be a worthwhile improvement. Also, I would prefer the ability to manually control the transmission.