Mind you, I've been to the UK. The buildings are built for warmth, not for getting rid of it.
It's because we love complaining. We spend all winter complaining about the lack of sun, most of summer complaining about the rain and on the three sunny days we get every year we complain that it's too hot.
I wonder what we would do if we got the same good weather all year round? Complain about the lack of variation? XD
I hate really hot days (over 25 degrees C) in the summer. When it gets to that temperature, all I can think of is sources of cold. When the rest of the summer is cloudy, windy or rainy, everyone seems to be dreaming of the heat. There is no happy medium.
I really enjoy the winter though. Snow makes everything look better, it is more fun as you can go sledging and have snowball fights, the skies are usually clear and sunny, and it ocasionally forces the school to close, so I get the day off!
If I lived in Australia with hot temperatures all year round, I would probably prefer the hot days. But I live in England, where high temperatures are rare, so I get excited when the temperature falls below 0 degrees C, and the first frosts come.
Onions.