Mr Man
Its good fun, very good fun, but dont get too carried away.
Flying a float aircraft is much like any other.
The landing and take off is a bit different, but not to a vast extent.
The problem in the UK is it is almost impossible to use the rating unless you happen to live in the right place and are prepared to invest in your own aircraft.
Of course in Scotland (so far as the UK is concerned) it opens up some of the most wonderful opportunitues for scenic places at which to land and for me that is the real beauty of float aircraft.
Ultimately from an aviators perspective it is just another skill (a bit like flying a twin for example) which is enjoyable to do for its own sake if that is your thing.
I hope you enjoy.