There's nothing quite like the challenge of strategically carrying what'd be most suitable for your mission.
From what I've seen, the Adventure Pouch is very underrated and undermentioned in its novel innovative approach to this series. It restrains the amount of items that we can carry and makes us take our time with selecting the most important article to take. Many fans would probably prefer to have all the items at once and set out right away. Instead they're given the chance to pick an item, consider its uses, and bring it along or leave it in the Item Check. As such, it helps immerse the player in the game even more because they can interpret the things it might be implemented for later on. With the limited slots (which thankfully grows as the game progresses) the Adventure Pouch provided plenty of initiative for meticulous planning and preparation.
For these reasons I loved the concept of it, even if it sometimes frustrated me. As a whole Skyward Sword made you gather a lot of necessities, namely from Skyloft, before you could embark to the next provincial quest. On occasion I'd forget to visit the bazaar to upgrade, purchase some new gear or a potion, and of course see my honey Peatrice grab a few things from the Item Check. Already on my Loftwing I'd find myself halfway between Skyloft and the beacon before realizing that I overlooked something. So I'd turn my bird around at once and get it. Now, in previous games I didn't have to mix-'n'-swap so much, and that did take a number of days to adapt, but not very long; therefore I'm glad that it was easy this time, because if they use the Pouch again it shouldn't be much different.
The amount of Rupees in Skyward Sword also affected my partiality to the Adventure Pouch. It might've had its restrictions, but loads of Hyrule's monetary units could still go into acquiring upgrades or additional item slots for it. As it turned out I wasn't left over with a gratuitous sum of Rupees, and that also made the Pouch to be a worthy accessory on Link's journey to retrieve Zelda and slay the rising menace.