Nifft
Penguin Herder
It really depends on who you want "in charge" of the ability. My version gives the player full control, while yours puts more control in the DM's hands -- what situation will crop up tomorrow? Will you regret having spent your bonus ranks in an emergency that's unlikely to reccur?
If you & your PCs are more comfortable with DM-driven story, it really doesn't matter much.
But it will be on your shoulders to make the PC not regret his spending choice too much -- just like a Ranger and his favored enemy choice(s)!
-- N
If you & your PCs are more comfortable with DM-driven story, it really doesn't matter much.

-- N