2826 from 2015 and
4488 from 2014 have to be my favorites, personally. I love the curves and functionality of 2826, and the classy LEDS and overall look that 4488 pulls off every season.
971 and
2791 from this year are pretty close runners up, as well as
33 from 2014. 971 and 2791 had some awesome flipping action while also looking polished and intricate. 33's catching flaps were enough to identify it from any stream quality, and the large logo on the back was a great edition.