I asked a lot of Stand Up Paddlers why they SUP, and the most popular answer was because it is fun and a great workout. 

Many people also enjoy the refreshing perspective of standing up on the water which gives one a better vantage point to see waves coming and the reef and marine life below them.

Some folks like the versatility of a SUP board.  They are stable enough to stand on, sit on and paddle like a canoe or lay down on and paddle like a surfboard.

Paddle surfing is a fun, dynamic activity that nearly anyone can enjoy, especially with the right equipment and conditions.  The 12’ boards are easy to balance on and great for flat water tours.  Smaller boards are more challenging to balance on, but more responsive and better suited for the surf.