I prefer warm sunny days, but not too hot. 20C-25C is perfect
I can't stand rainy days, I don't know why but rain always puts me in a terrible and depressed mood. Seriously I'll be happy one minute then it'll start raining and my mood will change straight away.
The cliche response of sunny, warm days aside, I also appreciate spring days just after a rainfall or with a light breeze blowing. I don't spend too much time outside but on days like that, I feel nature full force and make a point of getting some fresh air.
Sunny, warm, and windy days. Not too windy, just a simple summer breeze to really enjoy the day. I feel relaxed and calm knowing that the day could turn out great. That's my favorite weather. I also like rainy days. Not the cold, icy, and windy rainy days.
Thunderstorms. Hands down my favorite weather. And I mean full on thunder and lightning every 5 seconds. It makes me feel powerful and I would run outside, put my hands in the air, and laugh while shouting "Yes!!!" repeatedly.