Don't forget rainy season and dry season... both of which can be a huge pain in the A at their most extreme.
But here in Holland, my favourite season has to be spring, because everything seems to either come alive or awake from its winterly slumber, and the weather is generally pleasant. I'm not a summer person, I don't do all that well in the heat. Autumn makes me melancholic because of all the leaves falling. Winter is A-okay as well for completely different reasons than spring, so I guess winter would be my second favourite season.