Harnesses : Aren’t they all the same? Well, yes and no. They all serve the same purpose. Harnesses connect the rider to the kite and reduce rider fatigue by transferring the kite's pull from the arms to the body. But there are different styles and sizes, and finding the right one can make a big difference in comfort and performance.

This situation does not occur with a seat harness, as the harness is held in place with leg straps. Another advantage with a seat harness is less stress on your lower back, because the kite pull is transferred to the hips, not the back.
There are other options like board short harnesses (pro: you never have to choose what board shorts to wear; con: you never get to choose what board shorts to wear) and impact vest harnesses (like wearing chest armor, a good option if you are doing a lot of dangerous mega-loops), but it's all really just a matter of preference. Generally I have found that a lot of guys prefer the waist harness (no straps = no soprano singing), and girls like the seat harnesses, because the harness can't slide up and become a push-up bra!
Kiss The Sky Kiteboarding