I'd say Autumn best represents Odd; it's a time of change for a greater part of the world, where energy is shifted into something else and can bring out the contemplative side in a lot of us, traits which I can definitely relate to Odd

As for all the seasons, in general Odd prefers Fall and Winter (both for the cooler weather and the festivities that usually come with that time of year), but he by no means dislikes Spring and Summer