OOOh Boy...Here is my twist
On my Big Block Chevy I think of torque much the same as everyone else has (I think) suggested here...RPM, Drag, etc.

On an airplane I generally think of torque as the adverse yaw effect caused from increasing or decreasing the prop speed. When you add power you step on the right rudder and when you pull power you step on the left rudder. Using this description (effect of torque on flight) would lead me to believe (given the same engine) that the weight of the prop, length of the prop, and to a much lesser extent pitch of the prop would affect the "feeling" of torque.
I think going up in length and down in pitch will still increase the adverse effects of torque. So I guess if I wanted to torque roll I would use a big'o heavy flat prop. If I wanted to decrease the effects of torque I would use a light weight short high pitched prop.

Oh well, just another opinion.