Since the holidays have been, for me, equivalent to "heavier workload" for the last eight or nine years, it's never really "the holidays" for me anymore. Instead, around mid to late November when all the jingle-bell and snow advertisements start showing up everywhere, my responses is, in general, "Right, time to deal with this again."
That said? Steam sales. When the Steam sales start up, that's the closest I get to that Christmas feeling anymore. :|