I am a long time roguelike player (started with Moria back on the Amiga in ye goode olde days ...).
I stumbled over early versions of Dwarf Fortress every now and then. I read a lot of articles and always thought I should try that one day.
Finally the tutorials by TinyPirate and some other guys managed to get me into the game.
I was fascinated by the dazzling amount of detail.
My first fortresses all ended in a mess.
You know - thirsty dwarves throwing tantrums, goblins stealing and slaughtering erverything, lost miners on disconnected stairs, and so on.
One day I got a dwarf injured because of a little cave-in. Some minor injuries and a broken arm I believe.
I wondered what to do and found the hospital at the wiki. Trying to set one up sent me on a rollercoaster drive figuring out how to do it und to get all the stuff you need just to get a hospital going.
That being amazing enough then the doctors came and diagnosed and treated my dwarf, he got fed and pampered, sutured and plastered.
After reading the medical history sheet I was even more amazed.
I am still blown away by the little details you can find in every little nook from depictions on furniture to personal histories of dwarves and sparkling bits and bobs like a dwarf liking cows for their haunting moos.