I have no interest in Stand Up Paddleboarding. However, I can see where is can be fun, saiecpelly on those very flat days. But, I have no desire to try it. I have been surfing on a 'regular' surfboard since 1966, and have gotten a lifetime worth of fun from it. I suggest you at least try both (remember, start with LESSONS read my old answers). Which ever you enjoy most, stick with. Or, if you like them both, just in different conditions, do both. There is room in the ocean for all sorts of surfers (who have taken the time to learn the right way!!). Good luck, and have fun.