I like this stupid question. I wish I didn't have to go to work - I'd sit around researching the theory on YouTube.
I think the theory might not be stated correctly though. Remember when I was looking for that word to describe a certain quality a song had due to outside influences? I think there's a similar phenomenon at play here. At some point in your viewing of a series, a Pavlovian type response to the theme song occurs, so it may be that initially you might not have cared for a theme song, but if you watched the show enough, and you enjoyed the show, then you would begin to like the theme song. I can't remember my initial response to the theme song of
Gilligan's Island, but it's a pretty damn hokey song, so I can't imagine I would have liked it in the beginning.
I suppose it might be possible to intentionally come up with a theme song that was so horrible that it would override the show, like maybe something by
The Chipmunks, but my theory is that over time it would grow on you.
NCIS has a pretty crappy theme song (IMO), and I've been watching that show ever since
Defect mentioned it on here a long time ago. I've watched many many episodes, and that theme song hasn't really grown on me, but it does create a Pavlovian response that I'm about to be entertained for an hour.
LOST doesn't even have a theme song, just a sound effect, and it creates the same response.
Dammit, you're going to make me late for work...!