My last fort was in a terrifying zone that had the 'everything that dies becomes a zombie' attribute. I huddled everyone underground and got the supplies under before the undead came. Then I set about breaching the aquifier with the double slit method (Lemurson's, I believe. Thanks!). I had a walled off room attached to a room where a lever opens the door. When migrants came, I had not finished building these and they all died. The child they brought with them, became an adult and survived the longest before he died. I oppened the door and burrowed him, but he never made it. Second wave had five. This time, I had my safe double closed chamber enterance ready, pulled the level and burrowed the newcomers. The metalsmith made it inside the first chamber. I was tempted to close the door again, so I could let her inside, but her husband was the last survivor out in the open, so I gave him time to try and get to the room. Turns out, he was almost there, and I closed the door when we entered and temporarily unsealed the chamber to let them into the rest of the fort. I was super pleased to have not only saved some migrants, but to have saved both members of the couple by chance. I then got bored of trying to pierce the aquifier when I tried to use a second method to speed things up the no longer works with the way water flows in the new version. I should have been patient. Not wanting to start the aquifier piercing from scratch, I gave up on that fortress.
Now I am trying to make the most efficent, fun, and long-lasting fortress that I have ever made. Started out somewhere reasonably hospitable and am suprised to find how fast the time goes and how much I enjoy focusing on making things work as well as possible instead of having to focus constantly on survival. I have played fortresses in bad regions and aquifers for so long now, that it is odd for me to play a fort like this. The way I organized my fort, to make thing simpler on me in planning and for fun and simplicity, is to give a different floor to each category of job. And some misc floors too. Once the fort is larger, most jobs will be heavily segregated by burrows (Except that children live in the job burrow of a parent and sometimes spouses too). Each even having their on dining hall. Haulers will be important and they will have back passages and be allowed in the strore rooms of other dwarves job classes. My big dilemna still is: what to do about bath houses? I guess some areas will be shared for simplicity. Maybe I will have some shared meeting areas too.