I don't dislike dragons, but I just don't like using them again and again. It was more awesome when Legendaries/Mascots were birds, dogs, a giant sea creature, and a living rock formation. After Emerald's Rayquaza (not counting FR/LG), everything that came along were Dragons. From Steel to Water, Ghost, Fire, Electric, and Ice. It's like a Dragon-overload. I would love to see other creatures as well to be the Mascot of the newer generation(s).
If the Reshiram and Zekrom were not Dragons (aesthetically), I would love if they were a Tiger and a Dragon instead of Dragon-Dragon. Kyurem should be something like a chimera.