Hi Baphomet
Firstly you'd have to decide what sort of float/seaplane you like? As I operate/owned both I'll personally give my views:
Seaplane -
Advantages - Great feeling of speed on the water itself, low and fast; easier to land than a floatplane by a smidgeon; most have false floors thus don't worry about leaks :-)
Disadvantages - Carrying a lot of weight when not heading to the water, thus a trip to the centre isn't practical; you can't simply drop your draws (whilst on the water) and take a dip, because even if you could clamber back into the cockpit you'd be dragging heaps of either salt/fresh water back in as well which isn't really recommended
Floatplanes -
Advantages - Can have either straight or amphibious configuration, gives 2 planes for the price of one (most fixed wings can be converted) as removing floats takes me only 2 1/2 hours thus that trip to the centre is now realistic plus selling is definitely easier too; want to have a swim? Easy and sun baking a bonus! Easier to get out off the water in some conditions; float maintenance is way earier tha having the a/c submerged in water too;I recently saw a floatplane crash in Florida due engine failure after take-off and if it wasn't for those floats the pilot would have died, it's like a bullbar I guess.;
Disadvantages - If you simply don't like them
Now before those monohull guys start repling - :yuk: , it's simply my opinion "but if you were to give me a Catalina style plane and someone else maintains it, my arm could be twisted :thumb_up:
Regards
FP