I've always been fond of the pistol as an OH weapon. The animations and sounds are nice. But it seems like it just doesn't keep up with other OH weapons at all. For power dps, sword and focus seem to be much better, and condi mostly uses torch. I think the only place I've seen it used on the occasion is spvp for a quick stun.
But perhaps I've not done enough exploring with the weapon. In which scenarios is pistol preferred over the other OHs?