The new Nokia advert for maps on your mobile. You can take a look at it here.
It starts with one person drawing on a large sheet of paper, then expands out as more and more people add to it. I think it appeals to me as someone who has always enjoyed drawing. What I like about it is the way the close up shots captures the intensity of the people drawing - it reminds me of a care free time when drawing was something you did for fun. When you get caught up in the day-to-day tasks of running a business it's easy to forget the reason why you started doing it in the first place.
And my least favourite? Confused.com. Don't get me started!