I think an iconic DF stage should be formed from ASCII characters. The entire stage should be text-based.
Actually, DF is designed with tilesets in mind. In fact, the ASCII characters are graphical tiles with letters on them. Polls on the forum indicated that about half of all players use non-ASCII tilesets, so I think that a DF stage rather should incorporate typical 'Dorf stuff:
* Catsplosions (sudden moments of kittens everywhere)
* !!Cats!! that want to be petted (!!items!!-denoted are on fire, and fire spreads by touch, and Dorfs always pets cats.)
* Hidden Fun Stuff (in the lower levels (platforms) demons can attack you)
* Useless soap- and lye makers
* Dorfs smoothing walls and floors (could be slippery?)
* Dorfs (or even player characters) getting fey moods and running off to shut themselves into a workshop for a few seconds
* Huge amounts of stone and bone *mugs*, =flutes= and (toys)
* Mastercrafted statues and tables and chairs in a legendary dining room
* Wine loafs made with wine and finely chopped wine
* You lose stamina, and only drinking beer can restore it