I thought if I seal a vampire in a 3×3 room with a chair, my fortress becomes unbeatable and I also get a free bookkeeper as a bonus.
When I went to this plan for the first time, the vampire worn off all her clothes, threw a tantrum and dead painfully in her cave.
Before going for it for the second time, what should get prepared for? Ok, I'll put a whole stockpile of clothes in the cave in advance. What else?
Best Answer
As detailed here, the key is to catch the vampire before he/she makes any friends. The death of friends is the primary cause of tantrums and insanity. Clothes rotting away also have an effect, so you might want to make a chute where new clothes can be dropped in for the vampire.
Besides just having an undead bookkeeper, you can also use your vampire as a lever-puller. Of course, this makes it even more important to keep them from going insane, unless you really want to have !!FUN!!. The first link has a few more ways to use vampires, as well.