It's an amazing game, with special attention to the detail. From Link's reactions to temperatures and food consumption to the combat with every single type of enemy.
I enjoyed every minute of it!
The highlight for me was to climb the very top of the hyrule castle, just before fighting the final boss, to collect the Korok seed hiding there. The view was amazing and I am sure the devs did their best.
I felt that I had to collect every collectible:
900 korok seeds
385 images for the library
all 3 medals of honors
complete all the side quests
The most annoying part was trying to climb when it is raining.
Hint: Get the ancient shield, you won't regret it!