Well, now that the KOM series is over, I can say for sure that Heartbreak is definitely the easiest. The wind and cold made it uncomfortable, but it was an easy ride. I averaged a full mph faster at Heartbreak than Breathless, and breathless was 1 mph faster than Mulholland.

I still have my favorite century, and it's not any of the KOM three. My favorite remains:

The Grizzly!

Prettiest scenery, emptiest roads, nicest people, good climbs and descents. But I probably won't do it this year, I have a Big Sur tour starting a couple days after.