I like smoothing and engraving. Smoothing is done everywhere in the fortress, and I sometimes train engravers by smoothing the mined-out metal veins*. I generally just engrave the dining room (to keep the people happy) and nobles' rooms (to keep the nobles happy). I have the obscure engravings setting on.
*There were Dwarves once, in these mountains, hundreds of years ago. They lived in great cities carved out of stone, filled with jewels and riches. Little is known what happened to bring their end - some say they still live on, deep underground. Studies of some engravings found show Dwarven halls filled with carp - prehaps they were suffering from starvation, and bred the carp as a last attempt at creating food? Until we find a Dwarf Fortress, we will never know.
Finding a Dwarf Fortress, however, was what the great archaeologist Tunul Ecenkon has set out to do. His expedition had gone high up into the mountains and searched fruitlessly for many days. One morning however, he awoke to cries of delight. Xim Kadiumci, the young student, had found an opening into the ground. The picks were brought out and the whole was widened, and the group, lighting their lanterns, went in.
They were in some kind of tunnel. It was windy and odd-shaped, unlike most tunnels found previously, but still was smoothed out. Small slivers of gold glinted in the rock. The walls and floor were covered in engravings. Tunul looked at them, and saw Dwarves screaming, Dwarves in foetal positions, Dwarves talking and labouring, and a masterfully-engraved image of cheese. They walked on, down the tunnel, until suddenly, it came to an abrupt end, with no sign of a door or sealed passage in sight.
What was this strange passageway, superbly engraved but leading to nowhere? Was it a great construction, abandoned and unfinished? Was it some kind of Dwarven temple, designed to worship the very stone itself? Tunul never did find out. The group packed up their bags and continued into the mountain range. From high above, the cries of a giant eagle rang out, clear and sharp, across the snowy peaks.