I hated the Faron region, it felt uninspired, I hated scaling the tree, it just made me think back to OoT's first dungeon and reminded me i as playing a worse game, I also didn't like how the forest was filled with water later on either. The small section leading to the first dungeon wasn't very fun either, nor was finding the three Kikwi's. The Faron version of the Silent Realm was okay.
My favourite region was Lanayru, probably because the game forced me to spend most of my time there, i dont usualyl like the desert sections in Zelda games i don't like the colour palettes or the dead terrain, but its where anything mildly interesting is; such as the Temple of Time and the Gorge with the Thunder dragon and Sand Sea. Still i wasn't overly fond of any of the regions in this game even though they were well put together.