Current non-Christmas themed commercials: I really like the Mac versus PC commercials. I don't necessarily like what they say, but I like how the guys interact with each other.
Christmas commercials: I really enjoy the Tim Hortons one with the grand father attending his grandson's hockey game. His son sees him and asks him why he's there when he never went to his games. The grandfather pulls out an old card of him playing. It's absolutely adorable. I love the sentiment and sweetness behind the commercial.