Hi, this is Bruce from SEASOFT SCUBA. I wanted to add some thoughts to this thread because there is a lot of misunderstanding about dive booties.
There is no real downside to wearing thicker boots in warm climates. A home with thick insulation works just as well in warm climates as in cold, maybe better.
High top booties are sometimes a better option in warm water, especially if you are doing shore diving. Short booties will more easily allow sand into your bootie when entering the water, this drives me crazy personally.
A boot with a real elevated heel is preferable to a flat bottom "bedroom slipper" type bootie. We have all seen divers walking hunched over, it is not the weight of the gear causing this "hunching". It is the diver trying to transfer the center of gravity to the balls of the feet and toes because this is where we find balance and stability. An elevated heel allows you to walk upright with confidence, I mean we often carry more than a hundred pounds of gear!
A hard soled bootie is preferable to a soft soled bootie. Your foot inside a soft sole bootie will tend to flex up and down with the bootie inside the fin foot pocket. The small muscles and tendons of the arch especially are not designed to start and finish every kick, CRAMPS are the result. Hard soled booties will almost always eliminate cramping.
An arch support underneath the arch of your foot is important. Most booties do not have this feature, this gives the foot added comfort, support and stability. It also acts as a "lock" on the foot moving forward towards the front of the bootie.
Women often have trouble zipping up their booties. This is because most boots are made using a form called a "last". This last, unfortunately is designed for men. Fortunately I have a solution for you.
Take a water or other type of bottle and fill it with very hot or boiling water (be very careful). The bottle must be as big or bigger than your ankle. After zipping up the bootie, push the bottle down into the opening stretching the bootie opening to the new size of the water bottle. The hot water will heat up the air cells in the neoprene and when they cool, they will be in the new larger size. You must leave the bottle in until it completely cools.
I hope this information is useful to you, thanks for reading.
Bruce