Things to consider when buying booties, kayak shoes, river boots or wetsuit boots (whatever you call them!)

The Sole- If you think you may have to do considerable walking or hiking in them then choose a solid sole as a simple neoprene boot will leave your feet in tatters and can be dangerous if you need to make a quick exit!.
Warmth - The thicker the neoprene the warmer they are! The high ankles obviously keep your ankles warm as well as tucking into your trousers better.
Protection -  From both rubbing in your boat and scrambling about on the banks.