The big ones for me were/are media controls and seeing what's next on my calendar. Because of the physical buttons I can pause my music/skip songs/adjust volume

The big ones for me were/are media controls and seeing what's next on my calendar. Because of the physical buttons I can pause my music/skip songs/adjust volume without even looking at the screen. Bluetooth headphones often have media controls but in my experience they tend to be hard to use on wireless earbuds due to their size. Using my Pebble is much easier. No other smartwatch I've used has done this quite as well.