There seems to be a strong consensus about which traps to use when playing Hunter right now: Face Hunter uses explosive trap, midrange Hunter uses freeze trap. Of course some players deviate from this, but if you look at the decklists of professional or high-ranked players the trap choices seem to be very consistent.
What are the reasons for these choices? I can think of a few reasons for them, but I could also see how explosive trap would be good in midrage hunter or to a lesser extent freeze trap in Face Hunter.
And what about Snake trap? I've seen it played even at high levels a few times, but aside from the surprise factor I can't really see the appeal.