We had 2 very unusual earthquakes in Maryland within the past 3 years, the first one was like train rolling through the house, the second was much stronger and not as linear, just awful. So earthquake is number 2 for me.
Hurricanes, --seen plenty here, including a category 3 (but 2 when it went straight across the island we were on) in the Bahamas which created a great deal of damage.
But number 1 would easily be "Other" - a Derecho. Last summer we had a huge one roll through with straight-line hurricane force winds and it was the scariest natural thing I've lived through so far. There were outriders first, winds which drove debris ahead of the main event and it was like hordes of wolves running up the side of the house and over the roof, all the thumping and clicking of twigs, acorns, sand, branches, was like claws. Then we could hear the really strong wind approaching several minutes before it hit --it bowed the new (locked) double-paned windows inward letting wind gusts into the room, it blew the curtains out 90º. The house just felt hammered. The dogs were rather nervous before the derecho arrived. Augh, horrible. I can still taste adrenalin thinking about it.