Dressage or Jumping...?

Hi, I have been riding since age three, and I am fifteen now, I am close to an olympic level jumper, as I can jump almost 2 meters, I own eleven horses ( possibly twelve) but I am on level 2 dressage, I can canter, walk, trot, and do a small amount of gallop, but for the past nine years I have focused only of hunter jumped,do you think I should train dressage, I own a gypsy vanner who has a level 8 dressage, and I was wondering if I should, do you prefer it to jumping?