I come alive at the beginning of every season (shopping and otherwise)! It's when the season drags on that I get antsy. There's nothing interesting in the shops (or everything is picked over), you're tired of wearing seasonal clothes, and you can't wait to move on to the next phase of the year.
This is true of the weather, too. In winter, I love the first breath of spring and the sweet-smelling cherry blossoms. By late May I'm looking forward to summer in full bloom. By late August I'm sick of all the dried-out grass, and the kids are getting squirrelly, and I'm counting the days until the crisp fall air and back-to-school (i.e. a routine!) mornings. By late fall, all the leaves are off the trees and it's all soggy and bleak, and I can't wait for Christmas, with the hope of a little snow to enhance the mood.