Ooh, I've got one!
Machinery. Specifically two types:
The large, automated type, be it still or moving. Grinding gears, hammering pistons... the type of thing that could easily and soullessly crush someone without noticing or caring.
And the sprawling, wirey, duct-work type. Inflating bellows, palpatating pieces, sinewy cables running all about... Basically that which resembles the innards of some great, artificial being. If you've ever seen the movie "Brazil", there are lots of good examples in there.
Perhaps these are connected in someway to my hatred of cars...
Additionally, the anticipation of the sensation of rubbing a hard edge against a styrofome cup.
And spiders. But that's really more of a fear.
Go Moon!