The danger of building a line around one motif is that you rise and fall with it alone. It's a stylistic monoculture. Lines built around a fishing/nautical heritage, for ex, have a broader style base.
For a real-life example of the monoculture, check the rise and fall of skull-and-crossbones. A few years ago, it was fresh. Then it was omnipresent. Now it's just tired.