Lots of people wear Gath. They provide sun protection as a bonus on Downwinders you can get pretty dizzy hitting the water at speed. Kiting near rocks - why not? Go for it
The designs for water impact can get away with a much softer foam, the main thing IMO is to get a low profile one, big ones tend to give you a larger profile so your head doesn't break through the surface of the water as easily.
I've been using a brand called high testosterone It causes premature hair loss Looks like you've got a helmet on But feels great with the wind blowing through my skin