i prefer cooler air, movement is not needed, but i do have a filters, one of them adds moister to the air, no fans

I think it depends a lot on the person; many like the previous poster prefer cooler air and need moving air to be comfortable; others prefer it colder or warmer and some don't want moving air. Many people struggle with extreme warm and humid; that seems to be hard for most of us. I do fine in the cold, but it's a lot more difficult when it's cold AND windy. Last Christmas we had temps well below 0 and brutal winds and getting around outside was a real struggle for me

Too hot or too cold and it messes with me. I'm a mess in the shower with both a heater & the fan going - sometimes the window is cracked to get it "just right." Had some interesting debates w/family members about the arrangement & how it is PERFECT for me, as I have reminded them that I don't comment on how they take their showers. I live in the Mountains so cold can get too cold but summer isn't too bad at nearly 8000 feet. I breathe easier in town at around 6300 feet and even better at sea level but I need oxygen 24/7 all the time (for the last 4 years). The altitude doesn't really bother me when it's just a regular COPD day.
So, my answer is Spring :) cause it's just right - too hot is the worst.

Hello, I prefer the cooler air, easier to breathe. Hot and heavy air I tend to struggle. I can't be around a hot burning winters fire either. 16 to 22c is preferable and tolerable. I use a fan and air purifier all year-round .