Out of the OP's list I'd agree with rain. I hate riding in the rain, won't start a ride when it's raining, and hate getting caught in the rain, otherwise I'm out there. The only weather related rescue call I've ever made was in a hail storm on top of a mountain, like about half a foot by the time ms marko picked me up
Around here, hot and windy are your friend, and I get out in winter, so cold and windy as well. I actually love night riding and ice riding and nighttime ice riding and while I don't do my favorite mountains in winter I still climb as much as I can
Otherwise School buses. School buses are the worst, especially in the mountains. Always exciting
Also I'm increasingly suspicious of everything motorized on bike paths and have been taken down head on. Yes, I caused a scene over that one
Maybe you could say something more about your experience with # 6 - dogs?