Saddle choice is a personal thing and most people would probably need a different saddle on a road bike compared to an MTB. As others have said, a saddle can feel very different if its a couple of mm higher or lower...
personally I am happy with the
SMP4Bike from
Selle SMP. The channel is better than just a hole for me - I sit forward a lot
I am sure that they aren't the best for absolutely everyone, but I think they need to be on the list of the ones you consider next time you make a change