[Pragmatic]

I think this is system-agnostic...

So many adventures have generic two- or three-word names (gold/ivory chess set, for instance).

But every once in a while, the adventure includes a really fine piece of art that makes you say, "forget the selling price, this is going into our headquarters!"

One I remember (vaguely, don't remember where it was listed...) was a painting of elves hunting animals, and the scene was animated (like a Hogswart portrait).