My ground taxi experience is limited to AS332L2, and EC225LP. I endeavor to use diff braking as much as possible, as use of the pedals can cause significant roll in the opposite direction of the turn, due to high tail rotor position. On our undulating ramp/taxiway to the main, this can quickly start to look like static rollover material. Furthermore - in the winter when we encounter ice on the taxiway, the pedal is not as helpful as it leads to lateral skidding.
A sticky nose wheel can encourage the use of extra pedal but, as it was said earlier, the tail has a lot of work to do so I avoid it as much as possible.
A slight digression, but something I mentioned: Static rollover in ground taxi. If when taxiing the aircraft does roll, and the inside wheel begins to lift/the sensation of pitch begins -as the aircraft pivots around the axis subtended between the nose wheel and the outside wheel- immediate opposite pedal will stop the rolling. eg. turning right, aircraft rolls left: apply left pedal, lower lever.