I think winter is my favourite of seasons ... but not necessarily my favourite *writing* season. I like to see things outside my window, and with the sun starting to set at 3 pm I only get miserable and depressed. (And that's if the overcast snowy sky even lets you see the sun starting at around 8).
I think my favourite time to write is fall, when everything is golden and smells so nice.
You? What's your favourite season to write?
(and is it SNOWING where you are?)