My favorite problem of each grade ...so far.

The runner up of each grade:
The Swarm - Bishop,
Direction - Bishop,
The Mandala - Bishop
The Hatchling - Rocklands
Focus - Hueco
No Troublems - Squamish
Checkerboard - Bishop
Guns of Navarone - Hueco
Seven Spanish Angels - Bishop
Creaking Heights - Rocklands
No Excuse for Porn Hair - Squamish
The Solarium - Bishop
The Sleeping Lady - Leavenworth
Hershey's Symphony - Hueco
Sunshine Naked - Bishop