[AlecMataloni]

The answer is highly game-dependant.

Speed is often important in games with long stretches of travel.
(In my experience, 2011, Logomotion was a good example of this.)

Acceleration is important for traveling short distances quickly.
(Example: 2012, Rebound Rumble with the field cut in half. A dedicated scoring team could easily stay within their key area the whole game with the right ball acquisition strategy.)

High torque is important for games which require precision movements of a drivetrain (most teams aimed with their drive base in 2012), also for defensive games like 2007, Rack N Roll, where avoiding defensive robots was nearly impossible.

I guess the answer is All of the Above? Having a drivetrain with all of the abilities you mentioned would be the optimal situation; however, it's impossible to rank the qualities without knowing the game's demands.

Some people often tend to say that a drivetrain that can push through anyone is the best option; but, i believe that time spent pushing a defender is time wasted, as it's the defender's job to keep your score down. Your best strategy as an offense is avoiding defense, not trying to plow through it (unless of course there's blockading, which is totally illegal, but I've NEVER seen it called by a referee before).