This occurred to me several weeks ago, but I forgot to post it:
It is important to keep in mind that some forms of art are meaningless to a person regardless of the quality of the art when compared to other pieces in that format. In other words, some people just don't get it. I don't get dance as a performance art. This isn't to say it isn't beautiful or difficult, or that it's not a valid art form--it just means that the beauty and difficulty of dance are wasted on me, because that art form doesn't speak to me.
Commercials, on the other hand, do. And I'm sure my wife wishes they did less so, less often, and that I responded with less enthusiasm.
In any event, I say that to say this: it's OK for someone to dislike commercials because it's just not a form of art that means anything to them. But if they try to raise other arguments, particularly the arguments I addressed earlier, they're going to get an earful. Keep it simple--just say you don't get it, and I'll say "that's cool, I don't get dance" and we can move on to some other topic.
Additionally, here is a commercial starring my best friend, Garrett: