I'll have to say summer.
Spring is around the time my allergies start acting up, and it's NOT a fun time. And winter...well I hate the damned cold, not to mention all the FREAKING snow. And also because I'm usually the one who ends up doing all the shoveling most of the time. :redface2:
Summer is probably my favorite season, two months off from school PLUS some of my favrioute foods: fresh litchi, corn, and strawberries are only in season during this time