I am very easygoing but here is a partial list of things I don't like:
Every other motorist.
"No-see-ums", and all biting insects.
Cloyingly-sweet weed smell.
Sand in orifices.
The word "orifice".
Messy key chains.
Wearing the wrong thing to funerals.
CD's hanging from rear view mirrors.
People who don't like holidays.
People who don't like animals.
People who don't like a lot of things.
The word "pamper".
The word "engorged".
Ticking off minutes from the clock.
Ticking clocks when I'm trying to sleep.
Rolled-up projector screens and/or maps.
Rolled-down projector screens and/or maps.
Tripping on carpet.
The last half-inch of mechanical pencil lead.
Things with wheels.
The powder from latex gloves.
Missing a step.
Stepping on a phantom step.
The overflow drain on the bathtub.
Bicyclists when I'm driving.
Drivers when I'm cycling.
Circling parking lots.
Lots of parking in historic areas.
Parking brakes I forget I've set.
Braking with my left foot on accident.
Accidental paint spills.
Accidental dental problems.
Lists that are about procrastination.