I can't deal with rain. It makes the sky gloomy. It's usually accompanied by its friends Rain, Cold, and Worms (whom I also dislike). Everything gets wet and icky too.
These poor people agree: Rain is icky.
1) Tardiness:
I can't stand waiting for people. That in itself drives me crazy. But tardiness is a whole other story. I pretty much become the Hulk when people are late.