It primarily depends on what you look for in a series. More often than not Skyward Sword, Twilight Princess, Ocarina of Time, and Wind Waker seem to be the most popular games in the franchise. All four are vastly different and appeal to different people. I, personally, am fond of both SS and TP. I did find gameplay in SS to be easier than TP, however this game was made originally and solely for the Wii, so the gameplay may just seem more natural. I am also a fan of the story they tell, and how it sets the stage for the rest of the series.