I also was less than pleased from my Prius experience. It's not that it's a poor choice in much of any respect, it's just feels the refined essence of mundane driving experience.
At the time, I was deciding between the Honda Insight and Prius for a car to use as little fuel as possible for normal commuting and around-town trips.
I drove the Prius, and it felt just like most every sedan I've driven. Extremely mild handling manors, gentle transition to understeer when pushed. Brakes functional, propulsion functional, but nothing inspiring, and provided the road feedback of a sensory deprivation chamber (like most modern family sedans).
I drove the Insight, and it felt playful and enjoyable. No power, but great torque, and such low weight that it becomes fun to drive despite it's power shortcomings. It does reach 112mph given a long enough road, and uses none of the electric assist to sustain this speed.
I decided I liked it enough to pick one up, and it's been a damn fine car for me.

It would be a terrible choice for a plug-in hybrid though, as the rotor of the motor IS the flywheel of the engine, so it would be dragging the engine if you manipulated it to have independent control of the hybrid motor.